| Paper | Title | Page |
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TUPB67 |
Test Measurements of Beam Profile Monitor at HIRFL-RIBLL2 | |
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| The beam intensity supplied by HIRF-CSR has a wide range, high-intensity primary beams and low intensity fragment-beams in connection with the slow extraction and the fast beam-extraction from the synchrotron CSRm. The detector (CG) has been developed for the beam profile monitoring at radioactive beam line HIRFL-CSR. The front-end electronics are based on CPLD controlled sample-and-hold circuits and multiplexer. Remote control is used to tune the detector sensitivity by setting the gas pressure in the detector's cell, the bias voltage of the anode and the integration time. The test measurements results are presented in this paper. Keywords: beam profile monitor; current grids; multiplexer; HIRFL CSR; | ||
TUPB68 |
A new Multi-strip Ionization Chamber used as On-line Beam Profile Monitor at HIRFL-CSR | |
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| The beam extracted from CSRm is mainly used for heavy-ion tumor therapy and physics experiments with stable and radioactive ions. A position sensitive detector is usually implemented to monitor the primary beam online in the nuclear experiments. Meanwhile, the detector should be thin enough to reduce the influence of energy spread and beam purity. This paper describes the developing and building a new detector with position resolution better than 0.5mm (FWHM) and using metallic-membrane plating technology for sharp reducing electrode's thickness of detector. The sensitive area of the detector is (100×100)mm2, with 1mm strip pitch. The anodes, cathode and the sealed windows are all made by 2μm thick Mylar layer on which a 0.1μm thick film of aluminum has been plated. Total thickness of the detector is about 12μm. | ||