CN102156292A - Method for determining beam current distribution of special irradiation pipeline for single event effect by using nuclear track membrane - Google Patents
Method for determining beam current distribution of special irradiation pipeline for single event effect by using nuclear track membrane Download PDFInfo
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- CN102156292A CN102156292A CN 201110057034 CN201110057034A CN102156292A CN 102156292 A CN102156292 A CN 102156292A CN 201110057034 CN201110057034 CN 201110057034 CN 201110057034 A CN201110057034 A CN 201110057034A CN 102156292 A CN102156292 A CN 102156292A
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- 239000012528 membrane Substances 0.000 title claims abstract description 36
- 230000000694 effects Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003486 chemical etching Methods 0.000 claims abstract description 14
- 238000010884 ion-beam technique Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 20
- 238000005530 etching Methods 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 229920006267 polyester film Polymers 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 abstract 2
- 210000004492 nuclear pore Anatomy 0.000 abstract 2
- 150000002500 ions Chemical class 0.000 description 26
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- 229920002799 BoPET Polymers 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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Images
Abstract
The invention belongs to the irradiation pipeline beam current distribution measurement technology, and particularly relates to a method for determining the beam current distribution of a single event effect special irradiation pipeline by using a nuclear pore membrane. The method comprises the steps of carrying out chemical etching on a nuclear track membrane irradiated by heavy ion beam; determining the size of a beam spot of a pipeline beam; collecting the image of the etched nuclear pore membrane by using a camera arranged on an optical microscope, and transmitting the image to a computer provided with a video acquisition card; in the size range of the beam spot, the image in each cell is sequentially accessed through the division of the grid area; and counting the number of ion points on each cell image to determine the uniformity of the beam current. The method is simple to operate and low in implementation cost, and the measurement effect completely meets the requirement of the single event effect resistance performance evaluation test.
Description
Technical field
The invention belongs to irradiation channel line distribution measuring technology, be specifically related to a kind of method of determining the special-purpose irradiation channel line distribution of single particle effect with nucleopore membranes.
Background technology
After the single particle effect pipe special of HI-13 tandem accelerator R20 degree pipe string builds up, need determine the bundle spot size and the homogeneity of pipeline line.Existing bundle spot size and inhomogeneity measurement generally all are to adopt one group of Au Si surface barrier detector to carry out, by Au Si surface barrier detector is carried out level and vertical scan direction at the irradiation sample place along beam profile, survey the heavy ion fluence by this detector simultaneously, determine the size of heavy ion beam spot according to the situation of change of the shift position coordinate of detector and heavy ion fluence.After the size of determining the heavy ion beam spot, can obtain to restraint the spot center, carry out the scanning survey of fixed intervals by the counterweight ion beam spot, behind the end of scan data that measured in the sweep limit are handled, each scanning position point is surveyed counting deduct all scanning position points and surveys behind the mean value of counting divided by this mean value, the Two dimensional Distribution situation of spot fluence distribution heterogeneity and position relation is restrainted in acquisition.This method can obtain the homogeneity that the heavy ion fluence distributes in real time, but required measuring equipment complex structure is measured cost and compared higher.
Nucleopore membranes is based on the solid state nuclear track principle; in film, stay latent track after utilizing heavy ion to incide the film surface; form through the chemical etching reaming, increase along the latent track of ion track direction and can enlarge and deepen, form the conical track that enlarges at last with the chemical etching time.Nucleopore membranes is advanced filter film material, and it can be widely used in fields such as electronics, chemical industry, food, pharmacy, medical science and biology.The present invention utilizes this characteristic of nucleopore membranes to check quality of beam just, the comprehensively distributed intelligence of reacting pipe line directly perceived.
Summary of the invention
The object of the present invention is to provide and a kind ofly determine the method that the special-purpose irradiation channel line of single particle effect distributes, the bundle spot size dimension of pipeline line and the distributed intelligence and the homogeneity of line are analyzed accurately guaranteeing with nucleopore membranes.
Technical scheme of the present invention is as follows: a kind ofly determine the method that the special-purpose irradiation channel line of single particle effect distributes with nucleopore membranes, comprise the steps:
(1) will carry out chemical etching through the nucleopore membranes behind the heavy ion beam current irradiation;
(2) determine the bundle spot size dimension of pipeline line;
(3) image of the nucleopore membranes of utilization after the camera collection etching of installing on the optical microscope is sent to image on the computing machine that video frequency collection card is installed;
(4) in the magnitude range of bundle spot, by the division of net region, the image in each cell of access successively;
(5) ion of adding up on each cell image is counted, and determines the homogeneity of line.
Further, aforesaidly determine the method that the special-purpose irradiation channel line of single particle effect distributes with nucleopore membranes, selected nucleopore membranes is the PET polyester film of 50 micron thickness, and the size in the single ion aperture in the step (1) after the chemical etching is at the 1-2 micron.
Further, aforesaidly determine the method that the special-purpose irradiation channel line of single particle effect distributes with nucleopore membranes, the solution of chemical etching is the NaOH solution of 4.0～6.0 mol in the step (1), and temperature is 35～70 ℃, and etching period is 50～120 minutes.
Further, aforesaidly determine the method that the special-purpose irradiation channel line of single particle effect distributes, in the step (3), adopt the image of the nucleopore membranes after the CCD camera collection etching of low-light (level) with nucleopore membranes.
Further, aforesaidly determine the method that the special-purpose irradiation channel line of single particle effect distributes with nucleopore membranes, in the step (4), with 1cm be unit will to restraint the spot scope division be 10 * 10 grid, obtain 100 width of cloth images.
Further, aforesaidly determine the method that the special-purpose irradiation channel line of single particle effect distributes, in the step (5), select for use Image-Pro Plus software that each cell image is carried out the statistical computation of ionic points with nucleopore membranes.
Beneficial effect of the present invention is as follows: the present invention selects the PET polyester film of 50 micron thickness for use, by testing at bundle with the direct irradiation PET of the big bundle of the heavy ion film that regulates, control irradiation fluence, after chemical etching, under optical microscope, observe, the ion ichnography picture that obtains can intuitively be determined the distributed intelligence and the homogeneity of bundle spot size dimension and line through the simple and easy Treatment Analysis of software.This method is simple to operate, realizes that cost is low, and measurement effect satisfies the needs of anti-single particle effect Performance Evaluation test fully.
Description of drawings
Fig. 1 is a method flow diagram of the present invention;
Fig. 2 is the design sketch of a cell image after the etching of PET polyester film.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, provided by the present inventionly determine the method that the special-purpose irradiation channel line of single particle effect distributes, comprise the steps: with nucleopore membranes
(1) will carry out chemical etching through the nucleopore membranes behind the heavy ion beam current irradiation;
(2) determine the bundle spot size dimension of pipeline line;
(3) image of the nucleopore membranes of utilization after the camera collection etching of installing on the optical microscope is sent to image on the computing machine that video frequency collection card is installed;
(4) in the magnitude range of bundle spot, by the division of net region, the image in each cell of access successively;
(5) ion of adding up on each cell image is counted, and determines the homogeneity of line.
Each step to method is described in detail below.
Step (1) will be carried out chemical etching through the nucleopore membranes behind the heavy ion beam current irradiation.
Present embodiment selects for use polyester (PET) film of 50 micron thickness to be placed on the example platform of irradiation target chamber T4, by testing at bundle with the direct irradiation PET of the big bundle of the heavy ion polyester film that regulates, control irradiation fluence, after chemical etching, the ion track is observed under optical microscope, and the clear resolution that do not overlap each other is as the criterion.
Polyester film mainly is meant the biaxial stretching film that is made by the PET resin, PET can be made by DMT and glycol reaction, also can be made by TPA and glycol reaction, most PET film is to be made by the DMT raw material, and the resin properties viscosity that is used for film is close with the fiber level PET.Compare with other plastic sheetings commonly used, mylar has higher draw tensile strength, fabulous dimensional stability, lower hydroscopicity.Mylar is applied to insulating material, as insulating tape, nonwoven fabrics composite film etc. owing to have good electric and heat resistance; PET has thin thickness, intensity height, dimensionally stable, wear-resisting and agent of low hygroscopicity, becomes the main tape base of audiovisual tape; Again because good, the thin thickness of its transparency and well-pressed, high temperature resistant flushing can be applicable to sensitive film; Do not have toxicity adjuvant, gas barrier better in the mylar pulling process, particularly, can be used for food flexible packing, high speed cooking and freezing with aluminium, poly composite membrane.
The ion track size of PET film behind the irradiation after etching is moderate, can not be too big, and cause the ion track overlapped, can not be too little, be not easy to observe.Etching condition can clearly be differentiated according to ionic points observed under the selected microscope enlargement factor, and not linking to each other each other is as the criterion.Generally selecting object lens for use is 10 times microscopic examination image, and selected like this picture size is bigger, and the ion of statistics is counted more, is convenient to statistical study, reduces error.Based on this requirement, the size in single ion aperture is about Φ 1-2 micron after the needs control etching.Through a series of experiment, determine that the optimal etch condition is the NaOH solution of 4 mol, 70 ℃ of temperature, etching period are 55 minutes.Certainly according to the size of selecting the ion aperture for use, etching condition can change to some extent, and the NaOH solution concentration can be selected 4.0～6.0 mol for use, as 4.0 mol, 5.0 mol or 6.0 mol; Etch temperature is selected 35-70 ℃ for use, as 35 ℃, 50 ℃ or 70 ℃; Etching period was 50-120 minute, as 50 minutes, 55 minutes or 120 minutes.
Step (2) is determined the bundle spot size dimension of pipeline line.
PET film after the etching, have that ion irradiation crosses local and do not have the place of ion irradiation that the vestige of turning white is obviously arranged just can be differentiated by naked eyes, can find out the distributed areas by the ion beam spot of single particle effect special use irradiation channel intuitively, and can determine big or small.Present embodiment is the line irradiation through the single particle effect pipe special of HI-13 tandem accelerator R20 degree pipe string, bundle spot the chances are the circle of the Φ 11cm of rule not too.
Step (3), the image of the nucleopore membranes of utilization after the camera collection etching of installing on the optical microscope is sent to image on the computing machine that video frequency collection card is installed.
After polyester behind the irradiation (PET) film carries out chemical etching, after observing under 10 times of optical microscopes, need collecting clear picture.The present invention adopts the CCD camera that low-light (level) is installed on optical microscope to come the high-resolution images acquired, delivers to then on the computing machine that video frequency collection card is installed, and shows the image that arrives with microscopic examination in real time, and can gather memory image at any time.
Step (4), in the magnitude range of bundle spot, by the division of net region, the image in each cell of access successively.
PET film after the etching can be seen bundle spot size roughly, and choosing therebetween with 1cm is 10 * 10 grid scope of unit, and some access graph pictures arbitrarily in the lattice of each 1cm * 1cm are chosen successively and just obtained 100 width of cloth images.The concrete effect of a cell image as shown in Figure 2.
Step (5), the ion of adding up on each cell image is counted, and determines the homogeneity of line.
For the good image of gather, above ionic points be covered with comprehensively, need add up its number of ions.If method with several points, to be one heavy and the trouble work, by the investigation practice, the present invention selects for use Image-Pro Plus v 6.0 (For Windows) software image to be carried out the calculating of ionic points, by fully utilizing this software, particularly the calculating of this software/size function can be irised out each ionic points automatically, thereby the ion that counts every width of cloth image that can simple and fast is counted.The statistics that each ion of 100 width of cloth images is counted in the present embodiment is as shown in the table:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| 1 | 394 | 343 | 338 | 334 | 348 | 391 | 333 | 352 | 344 | 338 |
| 2 | 382 | 365 | 373 | 378 | 351 | 382 | 361 | 358 | 374 | 398 |
| 3 | 409 | 385 | 376 | 395 | 374 | 381 | 390 | 392 | 413 | 444 |
| 4 | 422 | 410 | 379 | 383 | 368 | 393 | 413 | 384 | 448 | 427 |
| 5 | 436 | 384 | 391 | 400 | 374 | 372 | 363 | 379 | 382 | 444 |
| 6 | 428 | 329 | 394 | 379 | 402 | 399 | 369 | 419 | 406 | 451 |
| 7 | 431 | 410 | 412 | 378 | 360 | 385 | 371 | 393 | 373 | 401 |
| 8 | 449 | 401 | 387 | 410 | 369 | 400 | 423 | 387 | 372 | 424 |
| 9 | 414 | 395 | 397 | 366 | 389 | 376 | 387 | 401 | 378 | 409 |
| 10 | 393 | 402 | 379 | 368 | 387 | 387 | 378 | 360 | 371 | 390 |
Then just can be by calculating the homogeneity of determining line, relevant calculating comprises the average ion number
Calculating, the calculating of standard deviation, and heteropical calculating.Concrete formula is as follows:
In the above-mentioned formula, k be for will restraint the cell sum that spot is divided into grid, N
iBe the number of ions of any one cell statistics,
Be the average ion number.
In the present embodiment, k=100, N
iAs above shown in the table, by calculating:
σ=26.36, heterogeneity=6.8%.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technology thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. determine the method that the special-purpose irradiation channel line of single particle effect distributes with nucleopore membranes for one kind, comprise the steps:
(1) will carry out chemical etching through the nucleopore membranes behind the heavy ion beam current irradiation;
(2) determine the bundle spot size dimension of pipeline line;
(3) image of the nucleopore membranes of utilization after the camera collection etching of installing on the optical microscope is sent to image on the computing machine that video frequency collection card is installed;
(4) in the magnitude range of bundle spot, by the division of net region, the image in each cell of access successively;
(5) ion of adding up on each cell image is counted, and determines the homogeneity of line.
2. the method for determining the special-purpose irradiation channel line distribution of single particle effect with nucleopore membranes as claimed in claim 1, it is characterized in that: selected nucleopore membranes is the PET polyester film of 50 micron thickness, and the size in the single ion aperture in the step (1) after the chemical etching is at the 1-2 micron.
3. the method for determining the special-purpose irradiation channel line distribution of single particle effect with nucleopore membranes as claimed in claim 2, it is characterized in that: the solution of chemical etching is the NaOH solution of 4.0～6.0 mol in the step (1), temperature is 35～70 ℃, and etching period is 50～120 minutes.
4. describedly determine the method that the special-purpose irradiation channel line of single particle effect distributes as claim 1 or 2 or 3, it is characterized in that: in the step (3), adopt the image of the nucleopore membranes after the CCD camera collection etching of low-light (level) with nucleopore membranes.
5. describedly determine the method that the special-purpose irradiation channel line of single particle effect distributes as claim 1 or 2 or 3, it is characterized in that with nucleopore membranes: in the step (4), with 1cm be unit will to restraint the spot scope division be 10 * 10 grid, obtain 100 width of cloth images.
6. describedly determine the method that the special-purpose irradiation channel line of single particle effect distributes as claim 1 or 2 or 3, it is characterized in that: in the step (5), select for use Image-Pro Plus software that each cell image is carried out the statistical computation of ionic points with nucleopore membranes.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144871A (en) * | 2017-05-08 | 2017-09-08 | 北京市化工职业病防治院 | Utilize the method for the track morphology of optical microscope inspection solid state nuclear track detector |
| CN109118947A (en) * | 2018-07-20 | 2019-01-01 | 四川理工学院 | The method that one-pass molding makes the nucleopore false-proof film of target security pattern |
| CN111867227A (en) * | 2020-07-22 | 2020-10-30 | 中国科学院近代物理研究所 | Automatic beam spot calibrating and adjusting device for nuclear track membrane production terminal |
| CN112835091A (en) * | 2021-01-05 | 2021-05-25 | 中国原子能科学研究院 | Micron-level beam distribution test method and device |
| CN112987077A (en) * | 2021-03-22 | 2021-06-18 | 中国科学院近代物理研究所 | Low-energy ion beam detection and ion beam current strength self-balancing interlocking control system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6291823B1 (en) * | 1999-10-12 | 2001-09-18 | Sandia Corporation | Ion-induced electron emission microscopy |
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- 2011-03-10 CN CN 201110057034 patent/CN102156292A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6291823B1 (en) * | 1999-10-12 | 2001-09-18 | Sandia Corporation | Ion-induced electron emission microscopy |
Non-Patent Citations (2)
| Title |
|---|
| 《固体核径迹论文集--第八届全国固体核径迹学术会议论文集》 20041031 沈东军等 用核孔膜测量微米级重离子束的束斑 , * |
| 《核技术》 20020731 骆亿生等 固体核径迹自动测量系统及其主要应用 , * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144871A (en) * | 2017-05-08 | 2017-09-08 | 北京市化工职业病防治院 | Utilize the method for the track morphology of optical microscope inspection solid state nuclear track detector |
| CN107144871B (en) * | 2017-05-08 | 2019-05-14 | 北京市化工职业病防治院 | Utilize the method for the track morphology of optical microscope inspection solid state nuclear track detector |
| CN109118947A (en) * | 2018-07-20 | 2019-01-01 | 四川理工学院 | The method that one-pass molding makes the nucleopore false-proof film of target security pattern |
| CN111867227A (en) * | 2020-07-22 | 2020-10-30 | 中国科学院近代物理研究所 | Automatic beam spot calibrating and adjusting device for nuclear track membrane production terminal |
| CN112835091A (en) * | 2021-01-05 | 2021-05-25 | 中国原子能科学研究院 | Micron-level beam distribution test method and device |
| CN112987077A (en) * | 2021-03-22 | 2021-06-18 | 中国科学院近代物理研究所 | Low-energy ion beam detection and ion beam current strength self-balancing interlocking control system |
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Application publication date: 20110817 |