| Title |
Development Status of a Stable BPM System for the SPring-8 Upgrade |
| Authors |
- H. Maesaka
RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
- H. Dewa, T. Fujita, M. Masaki, S. Takano
JASRI, Hyogo, Japan
|
| Abstract |
A stable and precise BPM system is necessary for the low-emittance upgrade of SPring-8. Key requirements for the BPM system are: 1) long-term stability to maintain the photon beam direction of the beamline well within the intrinsic photon divergence, 2) single-pass resolution better than 100 μm rms for a 100 pC injected bunch for first turn steering in the beam commissioning, and 3) accuracy better than 100 μm rms with respect to aligned quadrupole and sextupole magnet centers to achieve the design performance of the upgraded ring. To realize the demanded stability, the BPM drift should be reduced to 1 μm level. Therefore, we have been pursuing designs to suppress the thermal deformation of a BPM head and its support and to minimize the drifts of BPM electronics and coaxial cables. The investigation results on causes of drifts of the present SPring-8 BPM system are reflected to the design of the new BPM system. A button-type BPM head has been developed*, which can generate sufficient signal to satisfy the required single-pass resolution. We have also been studying the strategies of the alignment, position survey and electric center calibration of the BPM head better than 100 μm.
|
| Footnotes & References |
* M. Masaki et al., in this conference. |
| Paper |
download TUPG06.PDF [0.567 MB / 4 pages] |
| Poster |
download TUPG06_POSTER.PDF [5.250 MB] |
| Conference |
IBIC2016, Barcelona, Spain |
| Series |
International Beam Instrumentation Conference (5th) |
| Proceedings |
Link to full IBIC2016 Proccedings |
| Session |
Tuesday Poster Session |
| Date |
13-Sep-16 16:00–18:00 |
| Main Classification |
BPMs and Beam Stability |
| Keywords |
electronics, radiation, photon, quadrupole, alignment |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Isidre Costa (ALBA-CELLS, Barcelona, Spain); Ubaldo Iriso (ALBA-CELLS, Barcelona, Spain); Francis Pérez (ALBA-CELLS, Barcelona, Spain); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-177-9 |
| Published |
February 2017 |
| Copyright |
|
