SU439022A1 - Ultracold Neutron Storage Device - Google Patents
Ultracold Neutron Storage DeviceInfo
- Publication number
- SU439022A1 SU439022A1 SU1938184A SU1938184A SU439022A1 SU 439022 A1 SU439022 A1 SU 439022A1 SU 1938184 A SU1938184 A SU 1938184A SU 1938184 A SU1938184 A SU 1938184A SU 439022 A1 SU439022 A1 SU 439022A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- storage device
- neutron
- ucn
- converter
- ultracold
- Prior art date
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- Particle Accelerators (AREA)
Description
1one
Изобретение относитс к области экспериментальной нейтронной фнзики и может быть иснользовано дл наконленн ультрахолодных нейтронов (УХН) в замкнутом сосуде.The invention relates to the field of experimental neutron technology and can be used for extracting ultracold neutrons (UCN) in a closed vessel.
Известен накопитель УХН, содержащий механический затвор дл перекрывани входного отверсти замкнутого сосуда, в котором накапливаютс УХН, и импульсный источник нейтронов «однократного действи тина «ТРИГА (нли «РИИГ) или периодического действи частотой менее 10 гц тнна ИБР-30.A UCN accumulator is known that contains a mechanical shutter for closing the inlet of a closed vessel in which UCN accumulates, and a pulsed neutron source of a "single action" TRIGA (or "RIDG) or a periodic action with a frequency of less than 10 Hz ICN-30.
Одним из существенных недостатков такого накопител вл етс необходимость использовани конвертора, в котором генерируютс УХН с граничной скоростью Urp , значиоосоеOne of the significant drawbacks of such a storage device is the need to use a converter, in which UCNs are generated with the boundary velocity Urp,
тельно меньшей граничной скорости Urp нснользуемого накопительного сосуда (v - некотора критическа скорость дл данного материала, ниже которой нейтрон при любом угле падени отражаетс от границы раздела вакуум - среда). Обычно такие конверторы имеют большое сечение поглощени нейтронов и малую радиационную стойкость.the lower boundary velocity Urp of the utilized storage vessel (v is some critical velocity for a given material, below which the neutron at any angle of incidence reflects from the vacuum-medium interface). Typically, such converters have a large neutron absorption cross section and low radiation resistance.
В предложенном наконителе УХН указанные недостатки устранены за счет перекрывани входного отверсти накопительного сосуда импульсным магнитным затвором и выполнени конвертора из материала, гранична скорость которого близка к граничной скорости накопительного сосуда.In the proposed UCN tip, these drawbacks are eliminated by overlapping the inlet of the storage vessel with a pulsed magnetic gate and making the converter made of a material whose boundary velocity is close to the boundary velocity of the storage tank.
На чертеже схематично показан предложенный накопитель УХН.The drawing schematically shows the proposed drive UCN.
Накопитель УХН содерл ит замедлитель нейтронов 1, конвертор 2, импульсный соленоид 3, накопительный сосуд 4 с тонкой передней стенкой 5.The UCN drive contains a neutron moderator 1, a converter 2, a pulsed solenoid 3, a storage vessel 4 with a thin front wall 5.
Тепловые нейтроны из зaмeдлvlтeл , образовавшиес во врем вспышки мощности импульсного источника нейтронов, попадают в конвертор 2, материал которого имеет граничнуЕО скорость VTP , И Генерируют в немThermal neutrons from the thrusters produced during the outburst of the power of a pulsed neutron source enter the converter 2, the material of which has a limiting VTP speed, And is generated in it
УХН. Одновременно с имнульсом нейтронов на соленоид 3 подаетс импульс тока, создающий на конверторе приблизительно однородное магнитное поле напр женностью //, резко спадающее за тонкой нередней стенкой 5накопительного сосуда 4. Из конвертора выход т только нейтроны со скоростью .UCN Simultaneously with the neutron impulse, a current pulse is applied to the solenoid 3, creating an approximately uniform magnetic field on the converter with a intensity of //, abruptly falling behind the thin non-medium wall of the 5 accumulating vessel 4. Only neutrons with a speed go out of the converter.
Если гранична скорость материала накопительного сосуда f гр УГР ) то нейтроныIf the limiting velocity of the material of the storage vessel is f g OGR) then neutrons
свободно пройдут через переднюю стенку сосуда и начнут двигатьс в спадающем магнитном поле. Нри этом в зависимости от знака проекции спина нейтрона на направление магнитного пол они будут замедл тьс илиfreely pass through the front wall of the vessel and begin to move in a falling magnetic field. By this, depending on the sign of the projection of the spin of the neutron on the direction of the magnetic field, they will slow down or
ускор тьс . Так как из конвертора выход тspeed up. Since the output of the converter
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1938184A SU439022A1 (en) | 1973-07-02 | 1973-07-02 | Ultracold Neutron Storage Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1938184A SU439022A1 (en) | 1973-07-02 | 1973-07-02 | Ultracold Neutron Storage Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU439022A1 true SU439022A1 (en) | 1974-08-05 |
Family
ID=20558285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1938184A SU439022A1 (en) | 1973-07-02 | 1973-07-02 | Ultracold Neutron Storage Device |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU439022A1 (en) |
-
1973
- 1973-07-02 SU SU1938184A patent/SU439022A1/en active
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