Pressure distribution along the AGS vacuum chambers with new types of pump out conduits

Nayak, S.¹  Mapes, M.¹  Smart, L.¹  Weiss, D.¹ 

[1]Brookhaven National Lab. (BNL), Upton, NY (United States)

关键词: BROOKHAVEN AGS;    VACUUM PUMPS;    ELECTRIC CURRENTS;    DISTRIBUTION;    IONS;    MAGNETS;    VACUUM SYSTEMS;    STORAGE RINGS;    FINITE ELEMENT METHOD;    PRESSURE GAGES;    CALIBRATION;    PRESSURE RANGE MICRO PA;    PRESSURE GRADIENTS Alternating Gradient Synchrotron;   

DOI  :  10.2172/1228844
RP-ID  :  BNL--108555-2015-IR
PID  :  OSTI ID: 1228844
Others  :  R&D Project: KBCH139
Others  :  18038
Others  :  Other: KB0202011
Others  :  TRN: US1600104

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

The AGS HEBT and ring vacuum system is monitored by the discharge current of the magnet ion pumps, which is proportional to the pressure at the inlet port of these ion pumps. The discharge current is measured and suitably calibrated to indicate the ion pump pressure. In order to calculate the vacuum chamber pressure from the ion pump pressure, a detailed analysis is essential to compute their difference in different scenarios. Such analysis has been carried out numerically in the past for the system with the older type of pump out conduits, and similar analysis using FEM in ANSYS is presented in this paper with the newer type of pump out conduit.