CN104407370B - A kind of high sensitivity and the flat vacuum type compton detector of energy response - Google Patents
A kind of high sensitivity and the flat vacuum type compton detector of energy response Download PDFInfo
- Publication number
- CN104407370B CN104407370B CN201410683543.8A CN201410683543A CN104407370B CN 104407370 B CN104407370 B CN 104407370B CN 201410683543 A CN201410683543 A CN 201410683543A CN 104407370 B CN104407370 B CN 104407370B
- Authority
- CN
- China
- Prior art keywords
- pole plate
- detector
- tabular
- energy response
- cyclic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The present invention relates to a kind of vacuum type Compton gamma detector, compton detector that measure gamma ray specifically in strong current pulsed gamma radiation field, that sensitivity energy response is flat.In existing impulse gamma X-ray detection X, detector energy response is uneven, does not possess the resolution capability to projectile energy.In gamma ray intensity measurement, because Pulsed radiation field power spectrum is provided by theoretical calculation, there is some difference with actual power spectrum, and uncertainty of measurement is big, it is impossible to meets the needs of high-precision ionization meter.The present invention is kept off lead by detector front end, is substantially improved the energy response flat characteristic of compton detector using the emitter stage of thickness material superposition.On this basis, emitter stage thin material is optimized and uses multigroup emitter structure, improve detector sensitivity.
Description
Technical field
The present invention relates to a kind of compton detector for measuring impulse gamma ray, specifically exists for measurement fluence rate
1017~1022γ/(s·cm2), energy section in 0.4~5MeV, time spectrum half width more than 1ns impulse gamma ray and
A kind of vacuum type compton detector of design.
Background technology
In ray and matter interaction, Compton effect is dominant a kind of effect in very wide energy range,
So directly collecting gamma-rays occurs the current generated a kind of detector of Compton effect, compton detector is just referred to as
(or Compton diode).
Fig. 1 is vacuum compton detector (VCD) structural representation.High current gamma ray beam is injected by collimating aperture, one
Divide through entrance window, emitter stage, projected by exit window；With entrance window, emitter stage and exit window Kang Pu occurs for another part ray
Pause scattering, photoelectric effect and pair effect, produces electronics.It is in for energy for 0.5~10MeV gamma-rays, rear two
Kind effect probability very little, main function is Compton scattering.Both entrance window can have been collected on emitter stage, Kang Pu caused by exit window
Pause electronics, and acts on transmitting Compton electron with gamma-rays, and its differential section just forms current signal in emitter circuit.
Gamma ray intensity or sum measurement are one of major parameters of impulse gamma radiation field, and it directly determines pulse
The result of radiation field nuclear process.Therefore, gamma ray absolute intensity, number are measured and its is changed with time as pulse
Core content in the diagnosis of gamma radiation field.Obtain absolute intensity, the number of impulse gamma ray radiation field, it is desirable to exact knowledge
The sensitivity response of Pulsed radiation field gamma spectra and detector to different-energy gamma ray.However, impulse gamma radiates
Field energy spectrometry technically exist it is greatly difficult, in this case, to obtain impulse gamma ray absolute intensity and
One of the parameters, feasible method such as number are exactly to explore and establish the sensitivity energy in impulse gamma radiation field energy range to ring
The impulse gamma X-ray detection X technical principle and system architecture that should do not change with gamma energy, it is flat to develop energy response
Detector.
In existing impulse gamma X-ray detection X, mainly two class detectors are used：One kind is scintillator and photoelectric device
The scintillation detector of composition；Another kind is vacuum compton detector (VCD) and medium Kang Pu based on Compton effect design
Pause detector (DCD).Photodetector high sensitivity based on scintillator, is suitable for the measurement of low-intensity gamma ray beam, its
Sensitivity is generally 10-10-10-20C·cm2/ γ, this kind of detector is the detector based on collection of energy, to gamma ray
Detectivity is more violent with energy variation, and energy response is uneven；Compton detector is charge-trapping type detector, spirit
Sensitivity is very low, generally 10-19-10-23C·cm2/ γ, it is suitable for high intensity gamma beam parameter measurement, its energy response ratio
Scintillation detector is flat, but still not ideal enough.When both detectors are applied to the measurement of impulse gamma radiation field intensity,
Because Pulsed radiation field power spectrum is provided by theoretical calculation, there is some difference with actual power spectrum, causes measurement result not true
Surely spend larger.In a word, using existing detection means or detector, in pulsed radiation detection, detector does not possess in width
The characteristics of response of energy range self-energy is flat, does not possess the resolution capability to projectile energy.
What in November, 2005 published《Nuclear electronics and Detection Techniques》The 6th the 668-674 pages of the phase of volume 25 discloses one kind
The medium compton detector of energy response relatively flat, using front and rear scattering object, the adjustable structure of absorbed thickness, though
Certain effect is so played, but the result reported shows that planarization results are not highly desirable.In April, 2008, Tsing-Hua University doctor learned
Degree thesis whole-length《Impulse gamma flash detection technical research based on scattered electron》The electronics being emitted by collecting scattering target, research obtain
Obtained and be less than 15% detector system in 0.4~5MeV energy section, change of sensitivity.And scattering target conversion efficiency is low, gal
Horse scattering background influences big on useful signal so that detection system Sensitivity Calibration is more difficult, and demarcation uncertainty is larger.2012
June in year publishes《Light laser and the particle beams》The 6th the 1488-1492 pages of the phase of volume 24 discloses a kind of flat health of energy response
General detector design method, the emitter stage being superimposed using 0.01,1.00mm thickness Au, 3mm thickness Fe front windows and 3mm gear lead,
Under Ф 40mm collimations, realize in 0.4~7MeV γ energy area, the change of detector intrinsic sensitivity extreme value is less than 10.7%, visits
It is 1.611 × 10 to survey the intrinsic detection efficient of device-3E/ γ, sensitivity are 3.2 × 10-21C·cm2/γ.Although energy response is flat
Property achieves preferable effect, but detector sensitivity value is also relatively low.Have high sensitivity and the health of flat response concurrently simultaneously
General detector yet there are no all reports.
The content of the invention
It is an object of the present invention to provide a kind of high sensitivity and the flat vacuum type Compton gamma detector of energy response, with
Meet the high-acruracy survey requirement of the strong current pulsed gamma ray source strength of more Larger Dynamic scope.
The technical solution adopted by the present invention is：
A kind of high sensitivity and the flat vacuum type compton detector of energy response, including it is gear lead 1, collimater 2, incident
Window 3, sealed cylinder 4, vacuum degassing passage 5, insulation locating ring 6, insulated fixing support 7, electron emission pole plate, signal are drawn and led
Line 9, coaxial cable adapter 10, exit window 11；It is characterized in that：The electron emission pole plate includes primary electron emitter stage
Plate 8 and secondary electron emissions pole plate 12；The primary electron transmitting pole plate 8 and secondary electron emissions pole plate 12 pass through insulation respectively
Locating ring 6 is fixed on insulated fixing support 7, and is sequentially located between the entrance window 3 and exit window 11 at the rear of collimater 2；Institute
State cyclic thick pole plate and the thin pole plate of tabular that primary electron transmitting pole plate 8 includes being coaxially set and fitting together；The plate
The thin pole plate of shape is connected on cyclic thick pole plate in cyclic thick pole plate away from ray channel side pressure；The primary electron transmitting pole plate 8
The external diameter of cyclic thick pole plate is more than the internal diameter of collimater 2；The external diameter and internal diameter ratio of the cyclic thick pole plate are 1.5:1-5:1；Institute
The thickness ratio for stating cyclic thick pole plate and the thin pole plate of tabular is 100:1-20:1；The cyclic thick pole plate uses Z or high Z gold in mm levels
Belong to material；The thin pole plate of tabular has the high Z metal materials of ten micron orders of lower camber line trend using energy response；The secondary
Electron emission pole plate 12 includes the cyclic thick pole plate and the thin pole plate of tabular being coaxially set；The thin pole plate of tabular is in cyclic thick pole
Plate is connected on cyclic thick pole plate away from ray channel side pressure；The internal diameter of the cyclic thick pole plate of the secondary electron emissions pole plate 12 is big
In the internal diameter of the cyclic thick pole plate of primary electron transmitting pole plate 8；The external diameter and internal diameter ratio of the cyclic thick pole plate are 1.5:1-5:
1；The thickness ratio of the cyclic thick pole plate and the thin pole plate of tabular is 100:1-20:1；The cyclic thick pole plate use mm levels in Z or
High Z metal materials；The thin pole plate of tabular has the high Z metal materials of ten micron orders of lower camber line trend using energy response.
The thin pole plate of tabular in the thin pole plate of tabular and secondary electron emissions pole plate in primary electron transmitting pole plate uses
Ta, W, Os, Pt or Au.
In the ratio between external diameter and internal diameter of cyclic thick pole plate in primary electron transmitting pole plate and secondary electron emissions pole plate
The external diameter of cyclic thick pole plate and the optimum ratio of the ratio between internal diameter be 2:1
1~3mm of above-mentioned gear lead is thick, and above-mentioned entrance window is 1~4mm Fe plates.
Present invention beneficial effect compared with the prior art is：
1st, the detector aimed at is flat in the energy response of 0.4~5MeV sections, and actual energy responds flat section and is extended to
0.4~7MeV；
2nd, it is less than 6% in 0.4~7MeV energy section, energy response change fluctuation.Its flat spy in wide energy section
Property better than current various detectors.
3rd, the present invention can obtain detector sensitivity simultaneously as 10-20C·cm2/ γ magnitudes and energy response unevenness
Vacuum type compton detector less than 10%.
4th, the present invention meets strong current pulsed gamma ray intensity demand, can substantially reduce uncertainty of measurement.
5th, the present invention is more than the internal diameter of primary emission pole plate using the internal diameter of secondary emission pole plate, so as to realize sensitivity pole
Greatly and minimum deviation is less than 5.5%.
Brief description of the drawings
Fig. 1 is existing common vacuum compton detector structure；
Fig. 2 is double emitter stage high sensitivity vacuum compton detector overall structures of the invention；
Fig. 3 is different-thickness Au emitter stage outgoing electron numbers with incident gamma energy curves；
Fig. 4 be in 100 μm different-thickness Au emitter stage outgoing electron numbers with incident gamma energy curves；
Fig. 5 is double emitter stage high sensitivity vacuum compton detectors and the flat compton detector of in general single emitter
Energy response curve contrasts；
Reference is as follows：1- gear lead, 2- collimaters, 3- entrance windows, 4- sealed cylinders, 5- vacuum degassing passages, 6- are exhausted
Edge locating ring, 7- insulated fixing supports, 8- thickness material superposition electron emission pole plate, 9- signal extraction wires, 10- coaxial cables
Adapter, 11- exit windows, 12- secondary electron emissions pole plates.
Specific embodiment
The principle of the invention：
The present invention increases the number of transmitting pole plate using thickness material superposition transmitting pole plate, to improve the spirit of detector
Sensitivity.
In order to improve the energy response flat characteristic of detector, sensitivity energy response curve variation tendency should be selected in thickness
There is inverse variation trend metal under thin two kinds of situations, and coordinate gear lead, entrance window to determine.
Emitter stage thickness material uses mm level common metal materials, and profile is cylindrical hole, external diameter 50mm, internal diameter 25mm；
Thin material has the high Z metal materials of ten micron orders of lower camber line trend using energy response, mainly there is Ta, W, Os, Pt, Au, shape
Shape is the thin discs that external diameter is 50mm.Thin material is connected on thick material in transmitting pole plate away from ray channel side pressure.Mainly pass through
Different-thickness material area ratio is adjusted to adjust energy response flat characteristic.What Fig. 3, Fig. 4 gave different-thickness Au goes out radio
Sub-feature example.
In order to reduce low energy region energy response, 1~3mm Pb blocks (gear is set at detector ray channel front end 200mm
Lead).Entrance window is 1~4mm Fe plates, and welded seal is carried out with probe body drum closure body.By keeping off lead to low energy region
Decay and entrance window are to high energy flat characteristic in the further Attenuation adjustable compton detector of high-energy ray in gear lead rear end.
Exit window and sealed cylinder material are stainless steel, wherein, exit window thickness is 2-7mm, and sealed cylinder thickness is
2-5mm.Vacuum degassing passage is the copper pipe material that can carry out crimping encapsulation.The transmitting pole plate of different materials thickness superposition passes through letter
Number wire is connected with the cored wire of coaxial cable adapter draws measurement signal.
Insulated fixing support is fixed on exit window inner surface, and insulation locating ring is fixed on support, and emitter stage passes through exhausted
The crimping of edge locating ring is fixed.
Detector using when need to carry out surrounding shield and improve signal to noise ratio to reduce interference.Lead passage aperture for collimation
Φ 40, less than transmitting polar diameter, length is 200mm (or longer).
The present invention is described further below by embodiment：
The double emitter stage energy response flat detectors of embodiment
Referring to Fig. 2, the present embodiment is by gear lead 1, collimater 2, entrance window 3, sealed cylinder 4, vacuum degassing passage 5, insulation
Locating ring 6, insulated fixing support 7, primary electron transmitting pole plate 8, signal extraction wire 9, coaxial cable adapter 10, exit window
11, secondary electron emissions pole plate 12 forms.
Sealed cylinder 4 selects SUS304 stainless steel materials, and specification is external diameter 100 (unit mm, similarly hereinafter), and internal diameter 96 is long
The cylinder of degree 157.On the midpoint of sealed cylinder longitudinal length, two Φ 15 circular hole is symmetrically cut.By the internal diameter 13 of external diameter 15
Long 30 copper pipe is welded on one of circular hole, forms vacuum degassing passage 5；The internal diameter 13 of external diameter 15 is grown to 30 stainless steel tube
It is welded on another circular hole, other end sealing welding L16-50K coaxial cables seat (the skin connection stainless steel tube of cable block), structure
Into coaxial cable adapter 10.Signal lead-out wire 9 is from a diameter of 1mm copper conductor, the hair of one end connection thickness material superposition
Emitter-base bandgap grading plate, the core of other end connecting coaxial cable adapter 10.
Entrance window 3 selects pure iron material, and specification is Φ 96 × 3, and sealing welding is in one end of sealed cylinder 4, exit window 11
From pure iron material, specification is Φ 96 × 2, the other end of the sealing welding in sealed cylinder 4.Keep off lead 1mm.
In Fig. 5 " double targets " be the embodiment under energy response curve, detector 0.4-7MeV energy section, sensitivity pole
Greatly and minimum deviation is less than 5.5%.
Claims (4)
1. a kind of high sensitivity and the flat vacuum type compton detector of energy response, including gear lead (1), collimater (2), enter
Penetrate window (3), sealed cylinder (4), vacuum degassing passage (5), insulation locating ring (6), insulated fixing support (7), electron emitter
Plate, signal extraction wire (9), coaxial cable adapter (10), exit window (11)；
The electron emission pole plate includes primary electron transmitting pole plate (8) and secondary electron emissions pole plate (12)；
The primary electron transmitting pole plate (8) and secondary electron emissions pole plate (12) are fixed on by the locating ring that insulate (6) respectively
On insulated fixing support (7), and it is sequentially located between the entrance window (3) and exit window (11) at collimater (2) rear；
The primary electron transmitting pole plate (8) includes cyclic thick pole plate and the thin pole of tabular for being coaxially set and fitting together
Plate；The thin pole plate of tabular is connected on cyclic thick pole plate in cyclic thick pole plate away from ray channel side pressure；The primary electron hair
The external diameter of the cyclic thick pole plate of emitter-base bandgap grading plate (8) is more than the internal diameter of collimater (2)；The external diameter and internal diameter ratio of the cyclic thick pole plate be
1.5:1-5:1；The thickness ratio of the cyclic thick pole plate and the thin pole plate of tabular is 100:1-20:1；The cyclic thick pole plate uses mm
Z or high Z metal materials in level；The thin pole plate of tabular has the high Z metals of ten micron orders of lower camber line trend using energy response
Material；
It is characterized in that：
The secondary electron emissions pole plate (12) includes the cyclic thick pole plate and the thin pole plate of tabular being coaxially set；The tabular is thin
Pole plate is connected on cyclic thick pole plate in cyclic thick pole plate away from ray channel side pressure；The ring of the secondary electron emissions pole plate (12)
The internal diameter of shape thickness pole plate is more than the internal diameter of the cyclic thick pole plate of primary electron transmitting pole plate (8)；The external diameter of the cyclic thick pole plate
It is 1.5 with internal diameter ratio:1-5:1；The thickness ratio of the cyclic thick pole plate and the thin pole plate of tabular is 100:1-20:1；The cyclic thick
Pole plate uses Z or high Z metal materials in mm levels；The thin pole plate of tabular has ten microns of lower camber line trend using energy response
The high Z metal materials of level.
2. the high sensitivity according to claim 1 and flat vacuum type compton detector of energy response, its feature exist
In：Primary electron transmitting pole plate in the thin pole plate of tabular and secondary electron emissions pole plate in the thin pole plate of tabular using Ta, W,
Os, Pt or Au.
3. high sensitivity according to claim 1 or 2 and the flat vacuum type compton detector of energy response, its feature
It is：Ring in the ratio between external diameter and internal diameter of cyclic thick pole plate in primary electron transmitting pole plate and secondary electron emissions pole plate
The ratio between external diameter and internal diameter of shape thickness pole plate are 2:1.
4. the high sensitivity according to claim 3 and flat vacuum type compton detector of energy response, its feature exist
In：1~3mm of the gear lead is thick, and the entrance window is 1~4mm Fe plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683543.8A CN104407370B (en) | 2014-11-24 | 2014-11-24 | A kind of high sensitivity and the flat vacuum type compton detector of energy response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683543.8A CN104407370B (en) | 2014-11-24 | 2014-11-24 | A kind of high sensitivity and the flat vacuum type compton detector of energy response |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104407370A CN104407370A (en) | 2015-03-11 |
| CN104407370B true CN104407370B (en) | 2017-11-14 |
Family
ID=52645014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410683543.8A Active CN104407370B (en) | 2014-11-24 | 2014-11-24 | A kind of high sensitivity and the flat vacuum type compton detector of energy response |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104407370B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174693A (en) * | 2019-06-26 | 2019-08-27 | 中国工程物理研究院流体物理研究所 | A kind of stack multichannel Compton diode detector and measurement method |
| CN111694046B (en) * | 2020-07-24 | 2022-06-07 | 中国工程物理研究院核物理与化学研究所 | Single-energy gamma device |
| CN115236722B (en) * | 2022-07-28 | 2024-06-21 | 西北核技术研究所 | Secondary electron enhanced vacuum compton detector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251601A (en) * | 2008-04-07 | 2008-08-27 | 西北核技术研究所 | Dispersion type scintillation detector for impulse gamma detection |
| CN101634712A (en) * | 2009-09-02 | 2010-01-27 | 西北核技术研究所 | Pulse gamma radiation detector with low direct-radiation background |
| CN101699316A (en) * | 2009-10-26 | 2010-04-28 | 西北核技术研究所 | Gas scintillation based fission neutron detector |
| CN101609155B (en) * | 2009-08-05 | 2011-11-16 | 西北核技术研究所 | Broad-energy-spectrum pulse gamma detector |
| CN103091699A (en) * | 2012-12-29 | 2013-05-08 | 西北核技术研究所 | Device and method for measuring strong gamma ray energy spectrum using scattering method |
-
2014
- 2014-11-24 CN CN201410683543.8A patent/CN104407370B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251601A (en) * | 2008-04-07 | 2008-08-27 | 西北核技术研究所 | Dispersion type scintillation detector for impulse gamma detection |
| CN101609155B (en) * | 2009-08-05 | 2011-11-16 | 西北核技术研究所 | Broad-energy-spectrum pulse gamma detector |
| CN101634712A (en) * | 2009-09-02 | 2010-01-27 | 西北核技术研究所 | Pulse gamma radiation detector with low direct-radiation background |
| CN101699316A (en) * | 2009-10-26 | 2010-04-28 | 西北核技术研究所 | Gas scintillation based fission neutron detector |
| CN103091699A (en) * | 2012-12-29 | 2013-05-08 | 西北核技术研究所 | Device and method for measuring strong gamma ray energy spectrum using scattering method |
Non-Patent Citations (8)
| Title |
|---|
| Design and gamma sensitivity measurement of a novel dual-emitter vaccum Compton detector;Han He-Tong et al.;《Chinese Physics B》;20091130;第18卷(第11期);第4777-4780页 * |
| 厚入射窗真空康普顿探测器设计;韩和同 等;《核电子学与探测技术》;20100930;第30卷(第9期);第1266-1268页 * |
| 双发射极真空型康普顿伽马射线探测器;韩和同 等;《中国核科学技术进展报告——中国核学会2009年学术年会论文集》;20091118;第1卷;第198页倒数第2段-第200页第2段，图1-4 * |
| 基于散射电子的脉冲伽马闪烁探测器设计及其应用;夏良斌 等;《中国核科学技术进展报告——中国核学会2009年学术年会论文集》;20091118;第1卷;第193-196页 * |
| 复合金属发射极真空康普顿探测器结构设计;韩和同 等;《中国工程科学》;20091130;第11卷(第11期);第88-91页 * |
| 相对永久密封真空康普顿探测器伽马灵敏度研究;韩和同 等;《西安交通大学学报》;20090331;第43卷(第3期);第70-73页 * |
| 能量响应平坦的康普顿探测器设计;翁秀峰 等;《强激光与粒子束》;20120630;第24卷(第6期);摘要，正文第1-2节，图1-9，表1-2 * |
| 能量响应相对平坦的康普顿探测器;胡孟春 等;《核电子学与探测技术》;20051130;第25卷(第6期);第668-670、674页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104407370A (en) | 2015-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10301934B2 (en) | Downhole X-ray densitometer | |
| MX2007009001A (en) | High voltage x-ray generator and related oil well formation analysis apparatus and method. | |
| JP6234299B2 (en) | Radioactive gas monitor | |
| CN108983281A (en) | For measuring detection system and method for the scintillator electronics to be measured with respect to photoyield | |
| CN104407370B (en) | A kind of high sensitivity and the flat vacuum type compton detector of energy response | |
| JP6109304B2 (en) | Detector for radiation, especially high energy electromagnetic radiation | |
| CN112526584A (en) | Neutron energy spectrum measuring device and measuring method thereof | |
| CN102109606B (en) | Compensation type pulse X-ray detecting device with double scintillators | |
| JP2009079969A (en) | Radiation spectrum measuring system | |
| CN106597520A (en) | Three-channel runaway electron energy spectrum measuring device under nanosecond pulse discharge | |
| US9142383B2 (en) | Device and method for monitoring X-ray generation | |
| CN108535766A (en) | A kind of lamination flicker type anti-Compton gamma ray spectrometer | |
| US3238369A (en) | Fast neutron spectroscope for measurements in a high intensity time dependent neutron environment | |
| CN204479045U (en) | A kind of power transmission and transforming equipment corrosion-inhibiting coating gauge strips electrical measurement | |
| CN114236600A (en) | Neutron beam monitoring system based on silicon carbide detector | |
| CN104614752A (en) | Energy response flat multi-grid vacuum Compton detector | |
| Winn et al. | Secondary emission calorimeter sensor development | |
| US10996353B1 (en) | N-type gallium nitride scintillation for fast-neutron detection | |
| Krmar et al. | Possible use of CdTe detectors in kVp monitoring of diagnostic X-ray tubes | |
| CN106121628B (en) | 2228 lithologic density logging instrument with exemption source | |
| CN115267877B (en) | Pulse gamma absolute intensity detection device based on scattering gamma | |
| RU2281532C1 (en) | Device for complex measurements of spectral and power characteristics of accelerator electron emission and bremsstrahlung | |
| CN104391317B (en) | It is a kind of90The gamma spectrum analysis method of Sr | |
| CN115236722B (en) | Secondary electron enhanced vacuum compton detector | |
| CN214669624U (en) | X-ray energy detection device of accelerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |