CN102917529A - Helical multi-gap high-frequency resonance device and bunching and accelerating method - Google Patents
Helical multi-gap high-frequency resonance device and bunching and accelerating method Download PDFInfo
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Abstract
The invention relates to high-frequency resonance devices, particularly relates to high-frequency resonance devices for heavy-ion accelerators, and discloses a helical multi-gap high-frequency resonance device which comprises a cavity. A coupler support is arranged on the cavity, a first drift tube, a second drift tube, a third drift tube, a fourth drift tube, a fifth drift tube, a first helical arm and a second helical arm are arranged in the cavity, the first drift tube, the second drift tube, the third drift tube, the fourth drift tube and the fifth drift tube are coaxially arranged, and a coupler is erected between the first helical arm and the second helical arm by the aid of the coupler support. The invention further provides a bunching and accelerating method for the helical multi-gap high-frequency resonance device. The helical multi-gap high-frequency resonance device is in a low-voltage design, voltage redundancy is improved, and the helical multi-gap high-frequency resonance device has high potential in further increasing voltage; the construction cost is greatly saved owing to the structure and the size of the helical multi-gap high-frequency resonance device; and the integral bunching and accelerating stability can be improved along with improvement of double-grade quantity.
Description
Technical field:
The present invention relates to the high-frequency resonant device, relate in particular to the high-frequency resonant device that heavy ion avcceleration uses.
Background technology
For the construction of domestic and international accelerator facility high-frequency resonant device, especially the high-frequency resonant device of heavy ion avcceleration use adopts the quarter-wave structure, i.e. QWR mechanism more.Because operating frequency is lower, the resonator of general design is all larger, and this has caused very large inconvenience to the cost of engineering and total system integrated.At present there are in the world several laboratories that the research of carrying out helical structure is arranged, wherein the GSI of Canadian TRIUMF and Germany has similar research, but all be to be limited to the single arm structure of studying double gap, although this structure has solved the oversize problem of resonator, but because long interior thick stick has consumed too much power, so that the efficient of accelerator is not very high.
This class formation uses less at home, mainly be because mechanical process capacity is not enough at present, do not satisfy the application of accelerator for the precision guarantee of spiral-shaped structure, and the emi analysis to this kind structure is not enough, can't in impedance matching, guarantee in the situation of multichannel coupling that especially the consistency aspect of impedance matching has certain difficulty.
Summary of the invention
The object of the invention is to avoid the deficiencies in the prior art that a kind of raising voltage redundancy is provided, volume is little, saves construction cost, improves simultaneously the pack of the stability of whole accelerator and puts with many gaps of spiral type high-frequency resonant.
For achieving the above object, the technical scheme that the present invention takes is: many gaps of a kind of spiral type high-frequency resonant device, comprise cavity, be provided with the coupler support at cavity, described cavity is comprised of cylindrical outer wall and two circular side wall, cylindrical outer wall and two circular side wall have surrounded airtight cavity, be provided with the first drift tube and the 5th drift tube at the center of described two circular side wall, in cavity, also be provided with supporting seat, supporting seat is supported on the second drift tube and the 4th drift tube in the cavity by the first spiral arm and the second spiral arm, also be provided with support bar on the described supporting seat, be provided with the 3rd drift tube at the top of support bar, described the first drift tube, the second drift tube, the 3rd drift tube, the 4th drift tube, the coaxial setting of the 5th drift tube, gap between described the first drift tube and the second drift tube is the first drift tube gap, gap between the second drift tube and the 3rd drift tube is the second drift tube gap, gap between the 3rd drift tube and the 4th drift tube is the 3rd drift tube gap, and the gap between the 4th drift tube and the 5th drift tube is the 4th drift tube gap; Also be provided with tuner in the cavity above described the first spiral arm and the second spiral arm; Coupler is to the high frequency power of sending into of equilibrium in the first spiral arm and the second spiral arm, and described coupler support props up coupler and is located between described the first spiral arm and the second spiral arm.
Described the first spiral arm and the second spiral arm are the involute structure, its base radius is 40～100mm, spiral wall thickness is 20～40mm, profile total length half-twist～625 °, radius ratio is 2～4.5, and is preferred 3.455, contour length 400～1000mm, resonant frequency range is by 27～200MHz, and has identical interior external electromagnetic field interval between two spiral arm.
The concentricity of described the first drift tube, the second drift tube, the 3rd drift tube, the 4th drift tube, the 5th drift tube is less than 0.1mm.
It is three-dimensional circular that described drift tube is, drift tube thickness is 15～25mm, and the inside and outside chamfering of drift tube is 0～10mm, and chamber length is 200～500mm, internal diameter is 400～1000mm, ligament is 10～40mm, and resonance frequency is 27～200MHz, and relative velocity is 0.01～0.1, relative velocity described herein refers to the relative velocity compared with light velocity c, 0.01 be exactly 1% of the light velocity, the drift tube housing diameter is 100～1000mm, outer casing thickness is 100～500mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 0～90degree.
Described tuner is provided with at least two, and described tuner comprises the tuning plug that is arranged on the cylindrical outer wall, and tuning plug one end stretches out the cavity external world, and the other end of tuning plug is in described cavity and be connected with tuning.
Be provided with sampler at described cavity.
This resonator structure mainly is to connect drift tube by a plurality of spiral arm, has formed the distributed constant form of antiresonant circuit, can carry out the analog computation of microwave resonator.Mainly be by inserting coupler between the two-way spiral arm, feed-in microwave power to greatest extent in the situation of the electric field balance that guarantees both sides all needs the placement frequency tuner at nearly short-circuit end and nearly open end, is respectively coarse adjustment and fine tuning.Whole chamber is to be made by the oxygen-free copper of high conductivity, selecting oxygenless copper material mainly is the low-loss of considering whole resonator, improve the quality factor q of whole cavity because the high conductivity of copper material can reduce the wastage greatly, thereby the requirement that reduces power source can be saved cost greatly.
The structure of sampler is consistent with coupler, but the S11 Parameter Modulation can need to not damaged instrument to guarantee that height is decayed more than 0.9.At present, the test job of model cavity finishes, and parameters all relatively meets design result.
The present invention also provides the pack method of many gaps of a kind of described spiral type high-frequency resonant device: comprises the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite in the high-frequency resonant device cavity of many gaps of super helix type, and electromagnetic field is set up and beginning resonance;
(2) pack: when the high frequency voltage in power ratio control source was positioned at the zero phase place, just in time the interior center particle of described spiral type many gaps high-frequency resonant device cavity arrived between described the first drift tube gap; At this moment, the particle more Zao than center particle is subject to the impact of negative voltage, reduces speed now; And than the center particle late to particle owing to be subject to the acceleration of positive voltage, begin simultaneously with the center particle closely, form the particle beams.
Also comprise the steps:
(3) particle is after arrival the first drift tube gap is by pack, because the distance between the first drift tube gap is the wavelength of half resonance frequency, whole radio-frequency field was distributed in the second drift tube gap, the 3rd drift tube gap, the 4th drift tube gap and all differed 180 ° of phase places this moment; In the time of in particle enters the second drift tube pipe, particle is shielded by the drift tube tube wall and is not subjected to electric field action, when reaching the second drift tube gap, owing to after electric field has experienced 180 °, get back to original-180 °, again reach zero phase, particle this moment pack again, by that analogy, because the change-over time of the time of particle drift and electric field is corresponding, so particle is successively by being repeated repeatedly pack behind the 3rd drift tube gap, the 4th drift tube gap.Thereby efficient and the effect of pack have been improved.
The present invention also provides the accelerated method of many gaps of a kind of spiral type high-frequency resonant device: comprises the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite the cavity internal electric field of many gaps of super helix type high-frequency resonant device, and electromagnetic field is set up and beginning resonance;
(2) accelerate: when the high frequency voltage in power ratio control source is positioned at 60～90 ° in phase place, center particle in the high-frequency resonant device cavity of many gaps of described spiral type is at the first drift tube gap location, because the amplitude of voltage is higher, particle obtains energy gain, and particle is accelerated.
Also comprise the steps,
(3) particle is after arrival the first drift tube gap is accelerated, electric field reduce with reverse in, particle moves in drift tube, because the cause of shielding, electric field can not exert an influence to particle, when particle drift went out the second drift tube and arrives the second drift tube gap, electric field had reached again the acceleration mode of 60～90 ° in phase place through half period, and particle obtains to accelerate again; By that analogy, particle is successively by being repeated repeatedly to be accelerated behind the 3rd drift tube gap, the 4th drift tube gap.
The invention has the beneficial effects as follows:
The sort accelerator structure, can significantly improve the excessive problem of conventional cavity volume, and because the frequency range of non-constant width, go for the Resonator design of multi-frequency, under the basis that guarantees frequency, also can improve very high shunt impedance, obviously improve the secondary amount pattern of conventional QWR structure.In addition, a plurality of spiral wall concurrent ground structures of original creation can be avoided the generation of electric field " half range " phenomenon, have further improved the operating efficiency of resonator.Therefore, this structure is when having guaranteed low cost and reliability, becomes a kind of effective way that improves accelerator system stability.
This structure adopts low voltage designs, improves the voltage redundancy, has very large potentiality to further improving in the future voltage; On structure and size, saved greatly construction cost; Along with the improvement of secondary amount, can improve the stability of whole accelerator.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is cross-sectional view of the present invention;
Fig. 3 is the relational structure schematic diagram between coupler of the present invention and two spiral arm;
Fig. 4 is AA sectional structure schematic diagram of the present invention;
Fig. 5 is that BB of the present invention analyses and observe the plan structure schematic diagram;
Fig. 6 is the pack schematic diagram of many gaps of spiral type of the present invention high-frequency resonant device;
Fig. 7 is the acceleration principle figure of many gaps of spiral type of the present invention high-frequency resonant device.
Embodiment
Below principle of the present invention and feature are described, institute only gives an actual example and to be used for explanation the present invention, is not be used to limiting scope of the present invention.
Embodiment 1: see Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, many gaps of a kind of spiral type high-frequency resonant device, comprise cavity, be provided with coupler support 6 at cavity, described cavity is comprised of cylindrical outer wall 11 and two circular side wall 12, cylindrical outer wall 11 and two circular side wall 12 have surrounded airtight cavity, be provided with the first drift tube 21 and the 5th drift tube 25 at the center of described two circular side wall 12, in cavity, also be provided with supporting seat 3, supporting seat 3 is supported on the second drift tube 22 and the 4th drift tube 24 in the cavity by the first spiral arm 41 and the second spiral arm 42, also be provided with support bar 5 on the described supporting seat 3, be provided with the 3rd drift tube 23 at the top of support bar 5, described the first drift tube 21, the second drift tube 22, the 3rd drift tube 23, the 4th drift tube 24, the 25 coaxial settings of the 5th drift tube, gap between described the first drift tube 21 and the second drift tube 22 is the first drift tube gap 26, gap between the second drift tube 22 and the 3rd drift tube 23 is the second drift tube gap 27, gap between the 3rd drift tube 23 and the 4th drift tube 24 is that the gap between the 3rd drift tube gap 28, the four drift tubes 24 and the 5th drift tube 25 is the 4th drift tube gap 29; Also be provided with tuner 7 in the cavity above described the first spiral arm 41 and the second spiral arm 42; The balanced high frequency power of sending in 10 pairs of two spiral arm of coupler, described coupler support 6 is located at 10 of couplers between described the first spiral arm 41 and the second spiral arm 42.
Described the first spiral arm 41 and the second spiral arm 42 are the involute structure, its base radius is 40～100mm, spiral wall thickness is 20～40mm, profile total length half-twist～625 °, radius ratio is 2～4.5(3.455), contour length 400～1000mm, resonant frequency range is by 27～200MHz, and has identical interior external electromagnetic field interval between two spiral arm.
The concentricity of described the first drift tube 21, the second drift tube 22, the 3rd drift tube 23, the 4th drift tube 24, the 5th drift tube 25 is less than 0.1mm.It is three-dimensional circular that described five drift tubes all are, drift tube thickness is 15～25mm, the inside and outside chamfering of drift tube is 0～10mm, chamber length is 200～500mm, and internal diameter is 400～1000mm, and ligament is 10～40mm, resonance frequency is 27～200MHz, relative velocity is 0.01～0.1, and the drift tube housing diameter is 100～1000mm, and outer casing thickness is 100～500mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 0～90degree.
Described tuner 7 is provided with at least two, and described tuner 7 comprises the tuning plug 71 that is arranged on the cylindrical outer wall, and tuning plug 71 1 ends stretch out the cavity external world, and the other end of tuning plug 71 is in described cavity and be connected with tuning 72.Be provided with sampler 9 at described cavity.
Embodiment 2: as shown in Figure 6, the present invention also provides the pack method of many gaps of a kind of described spiral type high-frequency resonant device: comprise the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite in the high-frequency resonant device cavity of many gaps of super helix type, and electromagnetic field is set up and beginning resonance;
(2) pack: when the high frequency voltage in power ratio control source was positioned at the zero phase place, just in time the interior center particle of described spiral type many gaps high-frequency resonant device cavity arrived between described the first drift tube gap; At this moment, the particle more Zao than center particle is subject to the impact of negative voltage, reduces speed now; And than the center particle late to particle owing to be subject to the acceleration of positive voltage, begin simultaneously with the center particle closely, form the particle beams.
Embodiment 3: identical with embodiment 1, different is also to comprise the steps:
(3) particle is after arrival the first drift tube gap is by pack, because the distance between the first drift tube gap is the wavelength of half resonance frequency, whole radio-frequency field was distributed in the second drift tube gap, the 3rd drift tube gap, the 4th drift tube gap and all differed 180 ° of phase places this moment; In the time of in particle enters the second drift tube pipe, particle is shielded by the drift tube tube wall and is not subjected to electric field action, when reaching the second drift tube gap, owing to after electric field has experienced 180 °, get back to original-180 °, again reach zero phase, particle this moment pack again, by that analogy, because the change-over time of the time of particle drift and electric field is corresponding, so particle is successively by being repeated repeatedly pack behind the 3rd drift tube gap, the 4th drift tube gap.Thereby efficient and the effect of pack have been improved.
Embodiment 4: as shown in Figure 7, the present invention also provides the accelerated method of many gaps of a kind of spiral type high-frequency resonant device: comprise the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite the cavity internal electric field of many gaps of super helix type high-frequency resonant device, and electromagnetic field is set up and beginning resonance;
(2) accelerate: when the high frequency voltage in power ratio control source is positioned at 60～90 ° in phase place, center particle in the high-frequency resonant device cavity of many gaps of described spiral type is at the first drift tube gap location, because the amplitude of voltage is higher, particle obtains energy gain, and particle is accelerated.
Embodiment 5: identical with embodiment 4, different is also to comprise the steps,
(3) particle is after arrival the first drift tube gap is accelerated, electric field reduce with reverse in, particle moves in drift tube, because the cause of shielding, electric field can not exert an influence to particle, when particle drift went out the second drift tube and arrives the second drift tube gap, electric field had reached again the acceleration mode of 60～90 ° in phase place through half period, and particle obtains to accelerate again; By that analogy, particle is successively by being repeated repeatedly to be accelerated behind the 3rd drift tube gap, the 4th drift tube gap.
Embodiment 6: identical with embodiment 1, different is that described the first spiral arm 41 and the second spiral arm 42 are the involute structure, its base radius is 40mm, spiral wall thickness is 20mm, profile total length half-twist, radius ratio are 2, contour length 400mm, resonant frequency range is by 27MHz, and has identical interior external electromagnetic field interval between two spiral arm.
The concentricity of described the first drift tube 21, the second drift tube 22, the 3rd drift tube 23, the 4th drift tube 24, the 5th drift tube 25 is less than 0.1mm.It is three-dimensional circular that described five drift tubes all are, and drift tube thickness is 15mm, and the inside and outside chamfering of drift tube is 0mm, and the chamber is long to be 200mm, internal diameter is 400mm, and ligament is 10mm, and resonance frequency is 27MHz, relative velocity is 0.01, and the drift tube housing diameter is 100mm, and outer casing thickness is 100mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 0degree.
Embodiment 7: identical with embodiment 1, different is that described the first spiral arm 41 and the second spiral arm 42 are the involute structure, its base radius is 100mm, spiral wall thickness is 20～40mm, 625 ° of profile total length rotations, radius ratio is 4.5, contour length 1000mm, resonant frequency range is by 200MHz, and has identical interior external electromagnetic field interval between two spiral arm.
The concentricity of described the first drift tube 21, the second drift tube 22, the 3rd drift tube 23, the 4th drift tube 24, the 5th drift tube 25 is less than 0.1mm.It is three-dimensional circular that described five drift tubes all are, and drift tube thickness is 25mm, and the inside and outside chamfering of drift tube is 10mm, and the chamber is long to be 500mm, internal diameter is 1000mm, and ligament is 40mm, and resonance frequency is 200MHz, relative velocity is 0.1, and the drift tube housing diameter is 1000mm, and outer casing thickness is 500mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 90degree.
Embodiment 8: identical with embodiment 1, different is that described the first spiral arm 41 and the second spiral arm 42 are the involute structure, its base radius is 60mm, spiral wall thickness is 30mm, 450 ° of profile total length rotations, radius ratio is 3.455, contour length 650mm, resonant frequency range is by 125MHz, and has identical interior external electromagnetic field interval between two spiral arm.
The concentricity of described the first drift tube 21, the second drift tube 22, the 3rd drift tube 23, the 4th drift tube 24, the 5th drift tube 25 is less than 0.1mm.It is three-dimensional circular that described five drift tubes all are, and drift tube thickness is 20mm, and the inside and outside chamfering of drift tube is 5mm, and the chamber is long to be 350mm, internal diameter is 600mm, and ligament is 35mm, and resonance frequency is 65MHz, relative velocity is 0.5, and the drift tube housing diameter is 500mm, and outer casing thickness is 350mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 45degree.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. many gaps of spiral type high-frequency resonant device, comprise cavity, be provided with the coupler support at cavity, it is characterized in that: described cavity is comprised of cylindrical outer wall and two circular side wall, cylindrical outer wall and two circular side wall have surrounded airtight cavity, be provided with the first drift tube and the 5th drift tube at the center of described two circular side wall, in cavity, also be provided with supporting seat, supporting seat is supported on the second drift tube and the 4th drift tube in the cavity by the first spiral arm and the second spiral arm, also be provided with support bar on the described supporting seat, be provided with the 3rd drift tube at the top of support bar, described the first drift tube, the second drift tube, the 3rd drift tube, the 4th drift tube, the coaxial setting of the 5th drift tube, gap between described the first drift tube and the second drift tube is the first drift tube gap, gap between the second drift tube and the 3rd drift tube is the second drift tube gap, gap between the 3rd drift tube and the 4th drift tube is the 3rd drift tube gap, and the gap between the 4th drift tube and the 5th drift tube is the 4th drift tube gap; Also be provided with tuner in the cavity above described the first spiral arm and the second spiral arm; Coupler is to the high frequency power of sending into of equilibrium in the first spiral arm and the second spiral arm, and described coupler support props up coupler and is located between described the first spiral arm and the second spiral arm.
2. many gaps of spiral type as claimed in claim 1 high-frequency resonant device, it is characterized in that: described the first spiral arm and the second spiral arm are the involute structure, its base radius is 40～100mm, spiral wall thickness is 20～40mm, profile total length half-twist～625 °, radius ratio are 2～4.5, contour length 400～1000mm, resonant frequency range is by 27～200MHz, and has identical interior external electromagnetic field interval between two spiral arm.
3. many gaps of spiral type as claimed in claim 1 high-frequency resonant device, it is characterized in that: the concentricity of described the first drift tube, the second drift tube, the 3rd drift tube, the 4th drift tube, the 5th drift tube is less than 0.1mm.
4. many gaps of spiral type as claimed in claim 1 high-frequency resonant device, it is characterized in that: described drift tube is three-dimensional circular, drift tube thickness is 15～25mm, and the inside and outside chamfering of drift tube is 0～10mm, and chamber length is 200～500mm, internal diameter is 200～1000mm, ligament is 10～40mm, and resonance frequency is 27～200MHz, and relative velocity is 0.01～0.1, the drift tube housing diameter is 100～1000mm, and outer casing thickness is 100～500mm; Described coupler has rotatable coupling loop, and the anglec of rotation of coupling loop is 0～90degree.
5. many gaps of spiral type as claimed in claim 1 high-frequency resonant device, it is characterized in that: described tuner is provided with at least two, described tuner comprises the tuning plug that is arranged on the cylindrical outer wall, tuning plug one end stretches out the cavity external world, and the other end of tuning plug is in described cavity and be connected with tuning.
6. such as many gaps of the arbitrary described spiral type of claim 1 to 5 high-frequency resonant device, it is characterized in that: be provided with sampler at described cavity.
7. pack method such as many gaps of spiral type high-frequency resonant device as described in the claim 1 to 6: it is characterized in that: comprise the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite in the high-frequency resonant device cavity of many gaps of super helix type, and electromagnetic field is set up and beginning resonance;
(2) pack: when the high frequency voltage in power ratio control source was positioned at the zero phase place, just in time the interior center particle of described spiral type many gaps high-frequency resonant device cavity arrived between described the first drift tube gap; At this moment, the particle more Zao than center particle is subject to the impact of negative voltage, reduces speed now; And than the center particle late to particle owing to be subject to the acceleration of positive voltage, begin simultaneously with the center particle closely, form the particle beams.
8. the pack method of many gaps of spiral type high-frequency resonant device as claimed in claim 7: it is characterized in that: also comprise the steps:
(3) particle is after arrival the first drift tube gap is by pack, because the distance between the first drift tube gap is the wavelength of half resonance frequency, whole radio-frequency field was distributed in the second drift tube gap, the 3rd drift tube gap, the 4th drift tube gap and all differed 180 ° of phase places this moment; In the time of in particle enters the second drift tube pipe, particle is shielded by the drift tube tube wall and is not subjected to electric field action, when reaching the second drift tube gap, owing to after electric field has experienced 180 °, get back to original-180 °, again reach zero phase, particle this moment pack again, by that analogy, because the change-over time of the time of particle drift and electric field is corresponding, so particle is successively by being repeated repeatedly pack behind the 3rd drift tube gap, the 4th drift tube gap.
9. accelerated method such as many gaps of spiral type high-frequency resonant device as described in the claim 1 to 6: it is characterized in that: comprise the steps,
(1) resonance: power source is to many gaps of described spiral type high-frequency resonant device injecting power, when power source is consistent with the power of many gaps of spiral type high-frequency resonant device, power source can excite the cavity internal electric field of many gaps of super helix type high-frequency resonant device, and electromagnetic field is set up and beginning resonance;
(2) accelerate: when the high frequency voltage in power ratio control source is positioned at 60～90 ° in phase place, center particle in the high-frequency resonant device cavity of many gaps of described spiral type is at the first drift tube gap location, because the amplitude of voltage is higher, particle obtains energy gain, and particle is accelerated.
10. accelerated method of many gaps of spiral type high-frequency resonant device as claimed in claim 9: it is characterized in that: comprise the steps,
(3) particle is after arrival the first drift tube gap is accelerated, electric field reduce with reverse in, particle moves in drift tube, because the cause of shielding, electric field can not exert an influence to particle, when particle drift went out the second drift tube and arrives the second drift tube gap, electric field had reached again the acceleration mode of 60～90 ° in phase place through half period, and particle obtains to accelerate again; By that analogy, particle is successively by being repeated repeatedly to be accelerated behind the 3rd drift tube gap, the 4th drift tube gap.
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| CN108624870A (en) * | 2018-07-05 | 2018-10-09 | 成都纽曼和瑞微波技术有限公司 | A kind of tunable circle throwing cavate high power microwave plasma chemical vapor deposition unit |
| CN109936909A (en) * | 2019-04-02 | 2019-06-25 | 清华大学 | A kind of fixed structure and interdigital drift tube accelerator of drift tube |
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| CN108624870B (en) * | 2018-07-05 | 2023-07-28 | 成都纽曼和瑞微波技术有限公司 | Tunable round-parabolic cavity type high-power microwave plasma chemical vapor deposition device |
| CN109936909A (en) * | 2019-04-02 | 2019-06-25 | 清华大学 | A kind of fixed structure and interdigital drift tube accelerator of drift tube |
| CN109936909B (en) * | 2019-04-02 | 2020-09-04 | 清华大学 | Fixing structure of drift tube and interdigital drift tube accelerator |
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