Published in:2nd International Particle Accelerator Conference, IPAC, San Sebastian, Spain, 2011-09-04 - 2011-09-09
Language:
English
ISBN:
978-92-9083-366-6
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
Residual gas scintillation is used for measuring profile of the proton beam circulating in the COSY synchrotron. The problem of low rate of scintillation events detected by a multichannel photomultiplier is coped with byinjecting small amounts of pure nitrogen into the vacuum chamber of the Scintillation Profile Monitor (SPM). This leads to a temporary local pressure bump of no more than an order of magnitude. A commercially available piezoelectric dosing valve allows good control over the amplitude and duration of the pressure bump. Since the average pressure in the machine is hardly changed, the method is fully compatible with experiment operation.This approach offers a robust and inexpensive way to measure the beam profile. The design of the SPM is discussed. The latest measurement results and comparison to the ionization profile monitor data is presented.