| Paper | Title | Page |
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TUPA13 |
Design Status of Beam Position Monitors for ADS Injector II Proton LINAC | |
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| Beam Position Monitors (BPM) based on capacitive pick-ups are designed for Accelerator-Driven System (ADS) Injector II proton LINAC. This LINAC is aiming to produce a maximum design current of 15 mA at the 10 MeV energy with an operating frequency of 162.5 MHz. Non-interceptive BPM will be installed to measure the transverse beam position and beam phase in the vacuum chamber. Depending on the location, the response of the BPMs must be optimized for a beam with an energy range from 2.1 up to 10 MeV and an average current between 0.01 and 15 mA. Apart from the broadening of the electromagnetic field due to the low-beta beam, specific issues are affecting some of the BPMs: tiny space in the transport line between the RFQ and the cryomodule and the cryogenic temperature inside the cryomodule. For this reason two types of BPMs are being designed for each location (MEBT and cryomoudle). In this contribution, the present status of the design of each BPM will be presented, focusing on the electromagnetic response for low-beta beams. | ||
TUPB62 |
Transverse Emittance Measurement using Slit-Grid | |
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There are several ways to measure the beam transverse emittance. In this paper, the slit-grid emittance measurement device was proposed. The slit-grid is a one dimensional emittance measurement device. During the measurement, the slit, driven by the stepper motor is moved stepwise across the beam, and then the signal induced on the grid will be stored in the computer for further analysis. Because slit-grid is one dimensional device, two sets of this device are needed for transverse measurement. In this paper, we introduce the design, parameters, data acquisition and analysis for this measurement. Especially the software integration is given in this paper. The software development for emittance front-end control and data analysis is based on the labview language. The slit-grid device was tested at the 320kV high voltage platform in Lanzhou. The tested results were also presented in this paper.
beam transverse emittance,slit-grid |
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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. | ||