CN109116402A - A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector - Google Patents
A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector Download PDFInfo
- Publication number
- CN109116402A CN109116402A CN201810567941.1A CN201810567941A CN109116402A CN 109116402 A CN109116402 A CN 109116402A CN 201810567941 A CN201810567941 A CN 201810567941A CN 109116402 A CN109116402 A CN 109116402A
- Authority
- CN
- China
- Prior art keywords
- ellipsoid
- flight time
- scintillator
- focus
- optical system
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/203—Measuring radiation intensity with scintillation detectors the detector being made of plastics
Abstract
The invention belongs to Nuclear Physics fields, it is related to a kind of flight time detector, it is the aluminum reflective optical system of ellipsoid including inner surface, transparent plastic sheet is vertically and fixedly provided in reflective optical system, plastic sheet has a hole in the focal point digging of ellipsoid, and cladding thickness is the Plastic scintillation body thin film BC-422 of tens micron dimensions on hole；The photocathode center of photomultiplier tube R2083 is provided in another focus of reflective optical system inner surface.The configuration of the present invention is simple is easy to make, and the operation is stable is at low cost；The photon being emitted in scintillator is reflected by ellipsoid, is collected by equal light path by photomultiplier tube photocathode, is improved time resolution to the maximum extent.
Description
Technical field
The invention belongs to Nuclear Physics fields, are related to a kind of physics facility, and in particular to a kind of flight time spy
Survey device.
Background technique
In Nuclear Physics experimental study, time signal is an extremely important parameter, particle identify, detection,
Energy measurement etc. has other signal irreplaceable roles, and the accuracy of measurement being capable of precision and spy to related experiment
It surveys efficiency and generates important influence.
The detector of common time of measuring signal includes: semiconductor film film explorer, and Parallel plate avalanche detector is secondary
Electron emissive film and Microchannel Plates makeup time detector and plastic scintillant thin film detector.The limitation of wafer is
It is not suitable for doing starting time detector, the limitation of Parallel plate avalanche detector is that temporal resolution raising is not easy, and Microchannel Plates is visited
The shortcomings that surveying device is expensive, and detection efficient is lower.Plastic scintillant itself has that time response is fast, and detection efficient is high,
Allow counting rate high, the good feature of plasticity, after its film and photomultiplier tube are used cooperatively, time resolution is had been approached simultaneously
Reach the result of Microchannel Plates.As Nuclear Physics experimental study is more deep, required time semaphore request is more accurate, commonly
The time resolution of plastic scintillant thin film detector still has limitation.
Summary of the invention
It is an object of that present invention to provide a kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector,
It is simple with structure, improve time resolution the characteristics of.
A kind of flight time detector of the present invention, it is characterised in that: be the aluminum light of ellipsoid including inner surface
Reflector, transparent plastic sheet is vertically and fixedly provided in the reflective optical system, and the plastic sheet has in the focal point digging of ellipsoid
One hole, is covered with the Plastic scintillation body thin film BC-422 with a thickness of tens micron dimensions on the hole, in the reflective optical system
The photocathode center of photomultiplier tube R2083 is provided in another focus on surface.
Wherein preferred embodiment is as follows:
The edge of the transparent plastic sheet is painted, and sponges the light of the multiple reflections on transparent film, improves the time point
It distinguishes.
The edge of the scintillator is painted, and sponges the light of the multiple reflections in scintillator, improves time resolution.
Flight time detector of the present invention, it is characterised in that follow the steps below:
(1) particle beam injects scintillator film, and incoming particle can generate fluorescence, fluorescence in scintillator after off-energy
Outgoing inside scintillator has isotropism.
(2) fluorescence is propagated in scintillator, and after reflection, refraction and absorption, some photon is from scintillator film
The ellipsoid focus at place is emitted；
(3) it is mapped to reflective optical system inner surface from the photon that ellipsoid focus is emitted, is reflected by ellipsoid, ellipsoid equation
Are as follows:Photon must travel another focus；
(4) the photomultiplier tube photocathode of another focal point setting is collected photon, according to Fermat's principle, light from
For one focus of ellipsoid by being reflected into another focus, the propagation distance in all paths is all equal.
The present invention has the advantage that as follows: (1) ellipsoid focuses the light into a fleck of photocathode, and photoelectron is from light
The time qi that cathode is propagated to anode makes photomultiplier tube output pulse width narrow, time resolution improves, highest meter from reduction
Digit rate increases；(2) it can choose the lesser photomultiplier tube of photocathode area, reduce dark current, reduce threshold of detectability；(3) light
It by the i.e. reachable photocathode of primary event, and is original that is aplanatic, being generated in the light pulse and scitillation process being collected
Beginning light pulse is much like, improves time resolution to the maximum extent；(4) structure is simple, is easy to make, and the operation is stable is at low cost.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
In figure, 1, RIB 2, interior ellipsoid light reflection mirror 3, transparent plastic sheet 4, magnetic screen 5, BC-422 flashing film
6, polytetrafluoroethylene (PTFE) pad 7, photomultiplier tube R2083
Fig. 2 is Radioactive Ion Beam distribution map obtained in performance test of the present invention.
In figure, the flight time measured by the present invention combines particle energy loss to obtain Δ E-TOF spectrum, identifies in secondary beam and generates
's12N、11C core beam.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be further described.
Embodiment 1:
As shown in Figure 1, a kind of flight time detector, is the aluminum reflective optical system 2 of ellipsoid, the light including inner surface
Transparent plastic sheet 3 is vertically and fixedly provided in reflector, the plastic sheet has a hole, the hole in the focal point digging of ellipsoid
On be covered with Plastic scintillation body thin film 5 with a thickness of tens micron dimensions, in another focus of the reflective optical system inner surface
It is provided with the photocathode center 7 of photomultiplier tube R2083.
The edge of the transparent plastic sheet 3 is painted, and sponges the light of the multiple reflections on transparent film 3, improves the time
It differentiates.
The edge of the scintillator 5 is painted, and sponges the light of the multiple reflections in scintillator 5, improves time resolution.
Embodiment 2:
Flight time is measured using device described in embodiment 1, is followed the steps below:
(1) particle beam is injected on scintillator film 5, and incoming particle can generate fluorescence in scintillator 5 after off-energy,
Outgoing of the fluorescence inside scintillator 5 has isotropism.
(2) fluorescence is propagated in scintillator 5, and after reflection, refraction and absorption, some photon is from scintillator film
Ellipsoid focus 5 where 5 is emitted；
(3) it is mapped to reflective optical system inner surface 2 from the photon that ellipsoid focus is emitted, is reflected by ellipsoid, ellipsoid equation
Are as follows:Photon must travel another focus；
(4) the photomultiplier tube photocathode 7 of another focal point setting is collected photon, according to Fermat's principle, light
From one focus of ellipsoid by being reflected into another focus, the propagation distance in all paths is all equal.
Embodiment 3:
Using the method for the device and embodiment 2 of embodiment 1, the performance of test flight time detector, detailed process is such as
Under: with 80MeV/u's14N bombards primary Be target, combines separation Radioactive Ion Beam through magnet steel degree B ρ and degrader.Radioactivity line is most
Whole separating resulting is as shown in Fig. 2, wherein B ρ is set as Radioactive Ion Beam12N.It can be seen from the figure that being visited using the flight time
After surveying device, generation radioactive nuclear beam can be clearly told.It can show that the time resolution of detector is about as a result,
130ps, and existing half-sphere mirror detector time resolution is about 225ps.It was found from experiment: flight time detector is dividing
It during from radioactivity line, plays an important role, and time resolution significantly improves.
Claims (4)
1. a kind of flight time detector, it is characterised in that: be the aluminum reflective optical system of ellipsoid including inner surface, the light is anti-
Transparent plastic sheet is vertically and fixedly provided in emitter, the plastic sheet is dug in a focal point of ellipsoid a hole, on the hole
It is covered with the Plastic scintillation body thin film BC-422 with a thickness of tens micron dimensions, another focus of the reflective optical system inner surface
On be provided with the photocathode center of photomultiplier tube R2083.
2. a kind of flight time detector according to claim 1, it is characterised in that: the edge quilt of the transparent plastic sheet
Blacking.
3. a kind of flight time detector according to claim 1, it is characterised in that: the edge of the scintillator is applied
It is black.
4. a kind of flight time detector described in claim 1, it is characterised in that follow the steps below:
(1) particle beam injects scintillator film, and incoming particle can generate fluorescence in scintillator after off-energy, fluorescence is dodging
The outgoing for sparkling internal portion has isotropism；
(2) fluorescence is propagated in scintillator, and after reflection, refraction and absorption, some photon is where scintillator film
Ellipsoid focus outgoing；
(3) it is mapped to reflective optical system inner surface from the photon that ellipsoid focus is emitted, is reflected by ellipsoid, ellipsoid equation are as follows:Photon must travel another focus；
(4) the photomultiplier tube photocathode of another focal point setting is collected photon, and according to Fermat's principle, light is from ellipsoid
For one, face focus by being reflected into another focus, the propagation distance in all paths is all equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810567941.1A CN109116402A (en) | 2018-05-29 | 2018-05-29 | A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810567941.1A CN109116402A (en) | 2018-05-29 | 2018-05-29 | A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109116402A true CN109116402A (en) | 2019-01-01 |
Family
ID=64822761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810567941.1A Pending CN109116402A (en) | 2018-05-29 | 2018-05-29 | A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109116402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156485A (en) * | 2021-04-20 | 2021-07-23 | 中国科学院近代物理研究所 | Detector for weak particle beam on-line monitoring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831348Y (en) * | 2005-09-07 | 2006-10-25 | 中国科学院近代物理研究所 | High performance time pick-up device |
| US20170363768A1 (en) * | 2016-06-21 | 2017-12-21 | Schlumberber Technology Corporation | Compact scintillation detector |
-
2018
- 2018-05-29 CN CN201810567941.1A patent/CN109116402A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831348Y (en) * | 2005-09-07 | 2006-10-25 | 中国科学院近代物理研究所 | High performance time pick-up device |
| US20170363768A1 (en) * | 2016-06-21 | 2017-12-21 | Schlumberber Technology Corporation | Compact scintillation detector |
Non-Patent Citations (1)
| Title |
|---|
| 曾文: "15B的实验研究", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156485A (en) * | 2021-04-20 | 2021-07-23 | 中国科学院近代物理研究所 | Detector for weak particle beam on-line monitoring |
| CN113156485B (en) * | 2021-04-20 | 2022-10-04 | 中国科学院近代物理研究所 | Detector for weak particle beam on-line monitoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Elioff et al. | Antiproton-Nucleon Cross Sections from 0.5 to 1.0 BeV | |
| Marshall | Particle counting by Čerenkov radiation | |
| Mazzitelli et al. | A high resolution tpc based on gem optical readout | |
| CN109116402A (en) | A kind of novel ellipsoid focus type mirror image plastic scintillant flight time detector | |
| CN113885069A (en) | Alpha detector and D-T neutron marking device | |
| CN112285757A (en) | Radiation monitoring device and method | |
| Ohshima | Time-of-propagation counter: A new Cherenkov ring imaging detector | |
| Marshall | Cerenkov counters | |
| Girard | Development of the scintillating fibre tracker technology for the LHCb upgrade and the LHC beam profile monitoring system | |
| Heidbreder et al. | A balloon borne detector to determine high energy neutrons in energy and direction | |
| Moran | Detector development for γ‐ray diagnostics of D‐T fusion reactions | |
| Gichaba | Measurements of tyvek reflective properties for the pierre auger project | |
| Weinfurther | Designing an Optically Segmented Single-Volume Neutron Scatter Camera Using Simulation and Experimental Validation | |
| Singh et al. | D\'ej\a-vu et D\'ej\a-entendu: Associating fast radio bursts with compact binary mergers via gravitational lensing | |
| CN107505647A (en) | The improved structure of scintillation detector under a kind of neutron activation environment | |
| Seitz et al. | Modern Neutron Detectors with Fast Timing Resolution | |
| Achenbach et al. | Measurement of propagation time dispersion in a scintillator | |
| Ratcliff et al. | Cherenkov Radiation | |
| Kemp | Development of a silicon photomultiplier based scintillator detector for cosmic air showers | |
| de Figueiredo Ferreira | An Emulation Workbench for Position Sensitive Gaseous Scintillation Detectors | |
| CN111458741A (en) | Method for measuring motion direction of cosmic ray muons | |
| Zifeng et al. | Design and performance study of a gas-Cherenkov detector with an off-axis parabolic reflector for inertial confinement fusion experiments | |
| Ellis et al. | Measurement of the electron asymmetry parameter in the decay of polarised Σ− hyperons | |
| Kavatsyuk et al. | Photo-sensors for a Multi-PMT optical module in KM3NeT | |
| Vaiman et al. | A drone-borne installation for studying the composition of cosmic rays in the range of 1–1000 PeV by registering the reflected Cherenkov light of EAS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190101 |
|
| WD01 | Invention patent application deemed withdrawn after publication |