US3390342A - Ion beam remote control device haivng pulse shaping and restoring means - Google Patents

Ion beam remote control device haivng pulse shaping and restoring means Download PDF

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Publication number
US3390342A
US3390342A US473445A US47344565A US3390342A US 3390342 A US3390342 A US 3390342A US 473445 A US473445 A US 473445A US 47344565 A US47344565 A US 47344565A US 3390342 A US3390342 A US 3390342A
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Prior art keywords
generator
oscillator
signals
transformer
integrator
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Expired - Lifetime
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US473445A
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English (en)
Inventor
Breynat Genevieve
Pierson Alexandre
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Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Commissariat a lEnergie Atomique CEA
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
    • H01F38/06—Adaptations of transformers or inductances for specific applications or functions for non-linear operation for changing the wave shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J27/00—Ion beam tubes
    • H01J27/02—Ion sources; Ion guns
    • H01J27/16—Ion sources; Ion guns using high-frequency excitation, e.g. microwave excitation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/80—Generating trains of sinusoidal oscillations

Definitions

  • the present invention relates to a device for the remote-control of the ion-beam created by an ion-source submitted to a high frequency electric field, said device having its pulse-generator located near a control desk far from the ion-source.
  • the present invention relates to an ionbeam remote control device which is characterized in that it comprises a pulse-generator which emits rectangular signals and is adapted to control a differentiator and impedance reducer, the resulting thus differentiated signal being transmitted via a long coaxial cable to a stepdown pulse-transformer adapted to actuate an integrator which in turn, feeds a reconstituted rectangular but phaseinverted signal to a keyer adapted to provide the alternate blocking and unblocking of a high frequency oscillator.
  • said transformer comprises, inside a first insulating tube around which is wound the transformer primary winding, a second insulating tube coaxial therewith and forming a well at the bottom of which is located the transformer secondary winding.
  • the duration of the ion pulses is adjusted by the pulse generator, at the control desk. Once it has been differentiated, the signal can be transmitted, at low impedance, to the primary of the transformer, via a long coaxial cable.
  • the voltage at the exit of the transformer is chosen high enough for actuating the integrator without the need of an amplifying stage; once it has been restored by the integrator, the signal controls a conventional keyer-oscillator unit which, in turn, actuates the ion-source.
  • FIG. 1 is a block-diagram of the device according to the invention.
  • FIG. 2 shows the differentiator and impedance reducer of said device (reference 2 in FIG. 1);
  • FIG. 3 shows the step-down pulse-transformer of said device (reference 4 in FIG. 1);
  • FIG. 4 shows the lower portion of the transformer of FIG. 3, on :an enlarged scale
  • FIG. 5 shows the integrator of said device (reference 5 in FIG. 1);
  • FIG. 6 shows the keyer-oscillator of said device (reference 6 in FIG. 1).
  • the device From the control desk to the ion source, the device according to the invention successively comprises (as shown by FIG. 1) a pulse-generator 1 the output of which is connected to the input of a unit 2 acting as a differentiator and an impedance reducer, a long coaxial cable 3, a step-down pulse-transformer 4, an integrator 5 and a keyer-oscillator unit 6, and later being coupled to ion-source 7.
  • Pulse-generator 1, of a conventional type, and differentiator 2 are located in the vicinity of the control-desk, whereas transformer 4 and the other units are mounted in the vicinity of the ion-source, differentiator 2 and transformer 4 being connected by long coaxial cable 3.
  • the step-down pulse-transformer 4 is insulated up to about, e.g., 200 kv. Between its primary (connected to unit 2 by long coaxial cable 3) and its secondary (connected to integrator 5), this transformer withstands all the acceleration voltage, and it restores the pulses applied thereto, without any substantial distortion.
  • the primary 20 of transformer 4 is wound around a spool of nylon or of a similar material, and it comprises 300 turns.
  • the impedance of said primary must be high enough with respect to the cable resistance ohms in the specific example disclosed) in order to avoid over-shoots whatever he the characteristics of the pulses provided by generator 1.
  • the secondary 22 of transformer 4 formed of 40 turns, is also wound around a spool 23 of nylon" in the central portion of which is a core of ferrite 24. Insulation is ensured by a tube 25 of Haeffelite mounted inside spool 21 of the primary and the height of which is about 60 in. cm.), whereas that of spools 21 and 23 is of about 5 to 6 in. (12 to 15 cm.).
  • a large diameter torus 27 defines an equipotential surface which is wide enough for preventing ionization in connection cables.
  • a well 26 of Araldite at the bottom of which is located spool 23 around which is wound the secondary.
  • Well 26 and tube 25 are filled with transformer-oil which has been dehydrated before filling.
  • the fiip-fiop integrator stage 5 shown in FIG. 5 comprises its own source of direct voltage from the alternating voltage furnished by the transformer of unit 6; stage 5 can also be fed independently; a zener-diode 30 provides the stabilized voltage required for feeding the flip-flop.
  • the latter is constituted by a resistor 31 and a tunnel diode 32.
  • the output signal 33 of the pulse-transformer attacks said flip-flop through transistor 34 which acts as an impedance reducer.
  • the resulting signal is amplified by transistor 35 and fed at low impedance to the input of unit 6, through transistor 36.
  • the keyer-oscillator unit 6 (FIG. 6) essentially comprises an amplifier tube 40 and an oscillator 41, the grid of which is normally kept at a negative voltage by tube 40, said oscillator 41 being coupled to ion-source 7 by means of two rings 12 and 13.
  • Ion-source 7 of a conventional type, consists in an envelope 8 provided with an extraction slit 11 and an anode 10 for applying the extraction field; two rings 12 and 13 connected to HF oscillator 6 serve to create a high frequency electric field in ion-source 7.
  • pulsegenerator 1 emits positive rectangular signals 15, the dura tion and repetition frequency of which can be adjusted at will. These signals are differentiated and have their impedance reduced by stage 2 which, in turn, emits signals 18 which are fed, via the long coaxial cable 3 (which is for instance 500 feet long), to the primary of step-down pulse-transformer 4. The thus differentiated signals cannot be distorted by said pulse-transformer.
  • the latter at the output of its secondary, provides pulses the level of which is about $4 of the voltage of the pulses at the input of the primary; said transformer 4 is an impedance matching device for terminating the coaxial cable 3; flipfiop integrator stage 5, fed by the signal 33 emitted by the secondary, in turn, feeds a reconstituted rectangular but phase-inverted (therefore negative) signal 42 to the input of stage 6, i.e., to the control-grid of amplifier-tube 40, and the latter ensures the alternate blocking and unblocking of oscillator 41, which thus generates electric oscillations.
  • the device forming the object of the present invention can in particular be applied to the production of a pulsed ion-beam intended to generate a beam of neutrons.
  • a device for remote control of an ion beam from an ion source subjected to a high frequency electric field comprising, connected in series, a pulse generator emitting rectangular signals, a differentiating and impedance reducing unit connected to said generator and actuated by said generator and altering the signals emitted by said generator, said generator and said unit being located adjacent a control desk, a long coaxial cable, one end of said cable being connected to said unit, a step-down pulse transformer having primary and secondary windings connected to the other end of said cable, said primary wind ings of said transformer receiving the differentiated signals emitted by said unit, an integrator connected to said secondary windings and actuated by the signals emitted by said secondary windings, said integrator emitting reconstituted, rectangular, phase-inverted signals, a keyer connected to said integrator and actuated by the reconstituted signals, a high frequency oscillator connected to said keyer and alternately blocked and unblocked by said keyer, and two rings mounted on said ion source and connected
  • a device as described in claim 1, said differentiating and impedance reducing unit comprising a resistor capacity circuit and two push-pull mounted transistors.
  • said step-down pulse transformer comprising a first insulating tube, said primary winding being mounted around said first tube, a second insulating tube mounted inside said first tube, a well of insulating material within said second insulating tube, a spool at the bottom of said well, a core of ferrite within said spool, said secondary winding being mounted around said spool and a large diameter toru on said first tube defining an equipotential surface preventing ionization in connection cables.
  • said keyer oscillator comprising an amplifier tube, a control grid for said tube receiving the signals emitted by said integrator, an oscillator and a. grid for said oscillator normally kept at negative voltage by said tube.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Particle Accelerators (AREA)
US473445A 1964-07-22 1965-07-20 Ion beam remote control device haivng pulse shaping and restoring means Expired - Lifetime US3390342A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR982695A FR1409882A (fr) 1964-07-22 1964-07-22 Dispositif de commande à distance pour sources d'ions haute fréquence fonctionnanten impulsions

Publications (1)

Publication Number Publication Date
US3390342A true US3390342A (en) 1968-06-25

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ID=8835162

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Application Number Title Priority Date Filing Date
US473445A Expired - Lifetime US3390342A (en) 1964-07-22 1965-07-20 Ion beam remote control device haivng pulse shaping and restoring means

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US (1) US3390342A (enExample)
BE (1) BE666958A (enExample)
CH (1) CH443511A (enExample)
DE (1) DE1290262B (enExample)
ES (1) ES315687A1 (enExample)
FR (1) FR1409882A (enExample)
GB (1) GB1047366A (enExample)
IL (1) IL23966A (enExample)
LU (1) LU49122A1 (enExample)
NL (1) NL6509463A (enExample)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1046714A (en) * 1909-06-08 1912-12-10 Charles H Walker Telegraphy.
US2620446A (en) * 1950-09-11 1952-12-02 Vine Harris D Le Radiation detection and measuring means
US2621251A (en) * 1948-06-19 1952-12-09 Int Standard Electric Corp High-frequency preemphasis for pulse code modulation
US2676204A (en) * 1952-02-14 1954-04-20 Nederlanden Staat Pulse demodulating circuit
US3062913A (en) * 1960-03-10 1962-11-06 Rixon Electronics Inc High speed serial binary communication system for voice frequency circuits

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1293114A (fr) * 1961-03-30 1962-05-11 Commissariat Energie Atomique Procédé de pulsation d'un faisceau d'ions et dispositifs pour la mise en oeuvre de ce procédé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1046714A (en) * 1909-06-08 1912-12-10 Charles H Walker Telegraphy.
US2621251A (en) * 1948-06-19 1952-12-09 Int Standard Electric Corp High-frequency preemphasis for pulse code modulation
US2620446A (en) * 1950-09-11 1952-12-02 Vine Harris D Le Radiation detection and measuring means
US2676204A (en) * 1952-02-14 1954-04-20 Nederlanden Staat Pulse demodulating circuit
US3062913A (en) * 1960-03-10 1962-11-06 Rixon Electronics Inc High speed serial binary communication system for voice frequency circuits

Also Published As

Publication number Publication date
GB1047366A (enExample)
FR1409882A (fr) 1965-09-03
LU49122A1 (enExample) 1965-09-21
BE666958A (enExample) 1965-11-03
CH443511A (fr) 1967-09-15
NL6509463A (enExample) 1966-01-24
ES315687A1 (es) 1967-02-01
DE1290262B (de) 1969-03-06
IL23966A (en) 1969-11-12

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