Secondary-Electron-Emission Type of Beam Profile Monitor for the HIMAC-Injector(6MeV/u).
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Accession number;99A1045396
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| Title;Secondary-Electron-Emission Type of Beam Profile Monitor for the HIMAC-Injector(6MeV/u). |
| Author;
HIGASHI A
(Hyogo Pref. Gov., Hyogo, Jpn)
SATO Y
(National Inst. Radiological Sci.(nirs), Chiba, Jpn)
OHSAWA D
(National Inst. Radiological Sci.(nirs), Chiba, Jpn)
SOGA F
(National Inst. Radiological Sci.(nirs), Chiba, Jpn)
MUTO S
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
HASHIMOTO Y
(High Energy Accelerator Res. Organization(kek), Tokyo, Jpn)
FUJITA Y
(High Energy Accelerator Res. Organization(kek), Tokyo, Jpn)
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Journal Title;Proc Symp Accel Sci Technol
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Journal Code:F0512B
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ISSN:0914-2789
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VOL.12th;NO.;PAGE.90-92(1999)
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| Figure&Table&Reference;FIG.5, REF.3 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A beam profile monitor with the secondary-electron-emission phenomenon has been developed for radiation-biology experiments at the HIMAC(Heavy Ion Medical Accelerator in Chiba)-injector (RFQ+100MHz Alvarez). It is basically composed of three thin electrodes whose effective area and gap distances are 32*32mm2 and 2mm, respectively, 1mm-thick Al foil is used as a central electrode. Electrodes on both sides are 2mm thick alminized polypropylene films having a pattern of 16 strip-lines(1.5mm wide and 0.05mm spaced). These are, respectively, used for sensing vertical and horizontal profiles of secondary electrons emitted from the stripped electrode. It may be noted that the thickness of our beam profile monitor is very thin, i.e., the total amount of matter is less than 750mg/cm2. The charges induced in each strip-line is integrated with a respective pre-amplifier and the online beam profile is processed with a micro-computer. The sensitivity of the amplifier is determined by the beam intensity of the injector, i.e., 0.1nA order. The overall characteristics of the beam profile monitor under the bombardment with 6MeV/u .ALPHA. and C6+ ions from the HIMAC-injector are discussed. (author abst.) |
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