CN203055855U - Graphite gas ionization detector - Google Patents
Graphite gas ionization detector Download PDFInfo
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- CN203055855U CN203055855U CN 201220594710 CN201220594710U CN203055855U CN 203055855 U CN203055855 U CN 203055855U CN 201220594710 CN201220594710 CN 201220594710 CN 201220594710 U CN201220594710 U CN 201220594710U CN 203055855 U CN203055855 U CN 203055855U
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- graphite
- ionization chamber
- ionisation detector
- plate
- ionization
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Abstract
The utility model discloses a graphite gas ionization detector. The graphite gas ionization detector includes at least one ionization chamber module; and each ionization chamber module further comprises nine cylindrical graphite air ionization chambers. With the graphite gas ionization detector of the utility model, ionization chamber array modularization can be realized; and later-stage repair can be facilitated. With one common high-voltage pole adopted, production process can be simplified. With a graphite cylinder structure adopted, signal crosstalk between adjacent air ionization chambers can be reduced.
Description
Technical field
The utility model relates to the radiation therapy technology field, relates in particular to a kind of graphite ionisation detector of gas.
Background technology
At present, the main flow two-dimensional matrix that uses in the society is matrix 729 types of PTW company, matrix 1000 types of IBA company.This equipment has realized comprising two-dimensional measurement, the two dimension film is measured and online one dimension/two-dimensional measurement (measuring in real time), measure the not irradiation field of the strong technology of the people having the same aspiration and interest such as Step-and-shoot and Sliding window, accent intense irradiation open country separately and/or integration, the quality assurance of multi-leaf optical grating (MLC) is measured, light open country, launched field consistency checking, QA work (the evenness of linear accelerator, and the in good time imaging of radiotherapy high energy MV level X ray and diagnosis low energy KV level X ray symmetry checking etc.).
These equipment volume are little, and are in light weight, and the pendulum position is quick, easy to use behind the outfit special-purpose software.But whole matrix is integral structure, and nearly thousand air monitor are installed on the integral slab, have certain defective, are unfavorable for later period maintenance, as long as there is a detector to break down, just need carry out the integral body maintenance, and is inconvenient especially.Just be separated by with insulator between the adjacent ionization chamber besides, have during work and crosstalk, test data has certain deviation.
The utility model content
The purpose of this utility model is to propose a kind of graphite ionisation detector of gas, can realize the ionization chamber array moduleization, make things convenient for later period maintenance, and owing to adopt public high-pressure stage design, can simplify manufacture craft, adopt the graphite tube structure simultaneously, can reduce the signal cross-talk between the adjacent air ionization chamber.
For reaching this purpose, the utility model by the following technical solutions:
A kind of graphite ionisation detector of gas comprises being no less than 1 ionization chamber module that each ionization chamber module further comprises 9 cylindrical graphite air ionization chambers.
It is evenly distributed that described 9 cylindrical graphite air ionization chambers are 3 row, 3 row.
Described graphite air ionization chamber comprises receiving pole, first insulator, high-pressure stage and conductive layer.
The receiving pole lower end is provided with probe.
The ionization chamber module also comprises polyfluortetraethylene plate, and corresponding 9 the cylindrical graphite air ionization chambers of described polyfluortetraethylene plate arrange 9 cylindrical ladder holes, the corresponding receiving pole of the big end of diameter, the corresponding high-pressure stage of diameter small end.
Described polyfluortetraethylene plate is provided with and is no less than 1 aciculiform joint, and each joint is provided with shielding conductor.
Described high-pressure stage is the thin-walled graphite cylinder, and described conductive layer is the aluminium foil after 0.1 millimeter.
Connect by air vent hole between each graphite air ionization chamber, and be in communication with the outside.
Also comprise the ionization chamber location-plate, the ionization chamber module is installed on the ionization chamber location-plate, and the ionization chamber location-plate is provided with the polarized plug corresponding with the ionization chamber module, and described polarized plug upper end is connected with the ionization chamber module electrodes, and the lower end is connected with shielding conductor.
The ionization chamber location-plate comprises polarized plug and second insulator.
Adopt the technical solution of the utility model, can realize the ionization chamber array moduleization, made things convenient for later period maintenance, and owing to adopt public high-pressure stage design, can simplify manufacture craft, adopt the graphite tube structure, can reduce the signal cross-talk between the adjacent air ionization chamber.
Description of drawings
Fig. 1 is the schematic diagram of cylindrical graphite air ionization chamber in the utility model embodiment.
Fig. 2 is the polyfluortetraethylene plate schematic diagram of ionization chamber module in the utility model embodiment.
Fig. 3 is the matrix panel schematic diagram of ionization chamber location-plate in the utility model embodiment.
Fig. 4 is the schematic diagram that the ionization chamber module is installed in the ionization chamber location-plate in the utility model embodiment.
Fig. 5 is the front schematic view that the ionization chamber module is installed in the ionization chamber location-plate in the utility model embodiment.
Fig. 6 is the side schematic view that the ionization chamber module is installed in the ionization chamber location-plate in the utility model embodiment.
Fig. 7 is the local enlarged diagram of ionization chamber location-plate in the utility model embodiment.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Graphite ionisation detector of gas of the present utility model mainly contains a plurality of ionization chamber modules and ionization chamber location-plate.
As shown in Figure 1, each ionization chamber module further comprises 9 cylindrical air ionization chambers, and 9 cylindrical air ionization chambers are 3 row 3 and are listed as evenly distributed.Air ionization chamber comprises receiving pole 2, first insulator 1, high-pressure stage 3 and conductive layer 4, and the receiving pole lower end is provided with probe.
The ionization chamber module also comprises polyfluortetraethylene plate, as shown in Figure 2, corresponding 9 the cylindrical graphite air ionization chambers of this polyfluortetraethylene plate arrange 9 cylindrical ladder holes, the corresponding receiving pole of the big end of diameter, the corresponding high-pressure stage of diameter small end, high-pressure stage is the thin-walled graphite cylinder, and conductive layer is the aluminium foil after 0.1 millimeter.
This polyfluortetraethylene plate is provided with a plurality of aciculiform joints, and each joint is provided with shielding conductor.Connect by air vent hole between each graphite air ionization chamber, and be in communication with the outside.
As Fig. 3, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, the ionization chamber module is installed on the ionization chamber location-plate, and the ionization chamber location-plate is provided with the polarized plug corresponding with the ionization chamber module.The ionization chamber location-plate comprises polarized plug 5 and second insulator 6.
Specifically describe embodiment of the present utility model below.
The utility model is a kind of ionisation detector of gas array, is made up of a plurality of ionization chamber modules, and each ionization chamber module has 9 cylindrical graphite ionization chambers, and whole array has graphite ionization chamber number and can adjust as required.It can promptly obtain complicated 2-D data, has very high temporal resolution, the maximum detection launched field can change, and is a kind of real-time two-dimentional verification tool of intensity modulated therapy of very practical length, can also be used for the in good time imaging of radiotherapy high energy MV level X ray and diagnosis low energy KV level X ray.
Basic structure is evenly to process 9 circular holes that volume is identical on a foursquare polytetrafluoroethylene thin plate, can guarantee the spacing unanimity between each ionization chamber.The receiving pole of detector is fixed on the insulation board, and the receiving pole lower end connects a probe, is used for connecting electrometer.Adopt interference fit between receiving pole and the polyfluortetraethylene plate, receiving pole just can be fixed on the insulator.The ionization chamber module is installed on the base plate, is furnished with a plurality of aciculiform joints on the base plate, and each joint has independently shielding conductor connection electrometer.The high-pressure stage of ionization chamber module is made of graphite, and structure is the thin-walled graphite cylinder.The graphite high-pressure stage connects with the aluminium foil of 0.1 millimeters thick again, and these 9 air ionization chambers share a high-pressure stage.Have air vent hole to connect between each ionization chamber, and with extraneous UNICOM, guarantee that the air pressure in each ionization chamber is the same and identical with ambient air pressure, the variation of air pressure is the same to the influence of each ionization chamber like this.
Be sized to the identical cylindrical shoulder hole of uniform 9 diameters of centre-to-centre spacing with certain on polyfluortetraethylene plate, the bigger end of diameter is installed receiving pole, the less end of diameter and high-pressure stage butt joint.The stepped design in hole can be determined the installation site of graphite high-pressure stage, and is identical with the high-pressure stage position that guarantees each ionization chamber.The ionization chamber module is installed on the ionization chamber location-plate, and a plurality of positions ionization chamber polarized plug corresponding with the ionization chamber module arranged on the ionization chamber location-plate.The ionization chamber polarized plug has two effects, and locking position and holding wire are external, and polarized plug is that copper product is made, upper end and the butt joint of ionization chamber module electrodes, and the lower end can connect external shielding conductor.Electrode is with wrapped with insulation outward, and signal does not disturb mutually between the ionization chamber.
The contraposition boost line is arranged on the matrix panel, comprise launched field center and several launched field housing line commonly used, can conveniently carry out the matrix location.
Ionization chamber module critical piece has graphite high-pressure stage, insulator A, receiving pole, adopts interference fit between receiving pole and the insulator A, can be firm receiving pole is fixed on the insulator A.Graphite high-pressure stage and insulator A adopt matched in clearance, make things convenient for the replacing of graphite tube.The overall dimension of ionization chamber module all adopts negative common difference, and module can not interact when the ionization chamber location-plate is installed.After the ionization chamber module installed, conductive layer connected together all ionization chamber high-pressure stages, is connected to external high pressure at last.The ionization chamber location-plate is made up of ionization chamber polarized plug, insulator B.External shielding conductor welding back guarantees that with the insulating cement sealing solder joint is firm.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the utility model; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. a graphite ionisation detector of gas is characterized in that, comprises being no less than 1 ionization chamber module, and each ionization chamber module further comprises 9 cylindrical graphite air ionization chambers.
2. a kind of graphite ionisation detector of gas according to claim 1 is characterized in that, it is evenly distributed that described 9 cylindrical graphite air ionization chambers are 3 row, 3 row.
3. according to claim 1 or 2 described a kind of graphite ionisation detector of gas, it is characterized in that described graphite air ionization chamber comprises receiving pole, first insulator, high-pressure stage and conductive layer.
4. a kind of graphite ionisation detector of gas according to claim 3 is characterized in that the receiving pole lower end is provided with probe.
5. a kind of graphite ionisation detector of gas according to claim 3, it is characterized in that, the ionization chamber module also comprises polyfluortetraethylene plate, corresponding 9 the cylindrical graphite air ionization chambers of described polyfluortetraethylene plate arrange 9 cylindrical ladder holes, the corresponding receiving pole of the big end of diameter, the corresponding high-pressure stage of diameter small end.
6. a kind of graphite ionisation detector of gas according to claim 5 is characterized in that, described polyfluortetraethylene plate is provided with and is no less than 1 aciculiform joint, and each joint is provided with shielding conductor.
7. a kind of graphite ionisation detector of gas according to claim 3 is characterized in that, described high-pressure stage is the thin-walled graphite cylinder, and described conductive layer is the aluminium foil after 0.1 millimeter.
8. a kind of graphite ionisation detector of gas according to claim 3 is characterized in that, connects by air vent hole between each graphite air ionization chamber, and is in communication with the outside.
9. a kind of graphite ionisation detector of gas according to claim 3, it is characterized in that, also comprise the ionization chamber location-plate, the ionization chamber module is installed on the ionization chamber location-plate, the ionization chamber location-plate is provided with the polarized plug corresponding with the ionization chamber module, described polarized plug upper end is connected with the ionization chamber module electrodes, and the lower end is connected with shielding conductor.
10. a kind of graphite ionisation detector of gas according to claim 9 is characterized in that, the ionization chamber location-plate comprises polarized plug and second insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220594710 CN203055855U (en) | 2012-11-13 | 2012-11-13 | Graphite gas ionization detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220594710 CN203055855U (en) | 2012-11-13 | 2012-11-13 | Graphite gas ionization detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203055855U true CN203055855U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220594710 Expired - Fee Related CN203055855U (en) | 2012-11-13 | 2012-11-13 | Graphite gas ionization detector |
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| Country | Link |
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| CN (1) | CN203055855U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681390A (en) * | 2015-03-13 | 2015-06-03 | 中国计量科学研究院 | Graphite round-cake ionization chamber |
-
2012
- 2012-11-13 CN CN 201220594710 patent/CN203055855U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681390A (en) * | 2015-03-13 | 2015-06-03 | 中国计量科学研究院 | Graphite round-cake ionization chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131113 |