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SYSTEM OVERVIEW AND DESIGN CONSIDERATIONS OF THE BPM SYSTEM OF THE ESS LINAC

Document #:
ESS-doc-306-v2
Document type:
Conference Proceedings
Submitted by:
Hooman Hassanzadegan
Updated by:
Hooman Hassanzadegan
Document Created:
21 Oct 2013, 13:51
Contents Revised:
21 Oct 2013, 13:53
Metadata Revised:
21 Oct 2013, 14:01
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ESS-doc-306-v1
21 Oct 2013, 13:51
Abstract:
The ESS Linac will include in total more than 140 Beam Position Monitors of different sizes and types. The BPM system needs to measure the beam position, phase and intensity in all foreseen beam modes with a pulse rate of 14 Hz, duration of 2.86 ms and amplitude ranging form 5 mA to 62.5 mA. With respect to the BPM connection to the Machine Interlock System, the total response time must be less than 10 us. The signal level variations from one BPM to another along the Linac should be as small as possible to meet the requirements on the analog gain of the front-end electronics and the dynamic range of the digitizer card input. The other requirement is that the BPM system needs to give at least a rough estimation of the beam position and phase, even if the beam is significantly debouched, ex. during the Linac tuning phase. These requirements and their impact on the design of the BPM detector, the analog front-end electronics and the selection of the digitizer card are discussed in this paper along with a general description of the BPM system.
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