Cavity Beam Position Monitors
UCL LC group previosuly worked on designing cavity beam position monitors (BPMs) and this page is kept as a document of that. These devices are one of the key points in the design of the Energy Spectrometer. Activities were focused on the nanoBPM project at ATF, to develop a very high resolution of this type of BPMs. We also collaborated in the SLAC End Station A (ESA) tests. One of the test programs running there was on the Energy Spectrometer. A number of tests of different BPM designs were made at ESA, including Spectrometry-optimized BPMs we were now working on.
The main results were written up in this publication.Theory
BPM Theory courtesy of Alexey Liapine.
BPM design work schedule
- Fixed the cavity parameters using KEK, BINP, DESY/TU-Berlin and SLAC experience
- Electrical cavity design - 2 structures, round and rectangular - in progress
- Electronics design
- Design and produce 2 prototypes for a laboratory test
- Produce a prototype electronics
- Laboratory tests
- Final decision on the cavity structure, design tuning
- Mechanical design of the cavity
- Produce 3 vacuum prototype cavities for a resolution test
- Equip all 3 prototypes with complete electronics
- NEED a stable frame like LLNL design for resolution measurements:
- Soft and hardware for laboratory tests
A test bench has already partly arrived from DESY-Zeuthen, lab space will be ready in January 2006
Oscillators for 5.0-5.5 GHz and 5.8-6.8 GHz to complete the test bench were provided by Hittite. Many thanks for their support. - Data analysis software
MatLab to ROOT data conversion code including fitting analysis, ATF data - DAQ soft and hardware
- Soft and hardware for laboratory tests