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| Title | Development of MTCA.4-Based BPM Electronics for SPring-8 Upgrade | |
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| Abstract | We have developed a new button-BPM readout electronics based on the MTCA.4 standard for the low-emittance upgrade of SPring-8 [*]. Requirements for the BPM system are a high single-pass BPM resolution of better than 100 µm for a 100 pC injected bunch to achieve first-turn steering in the commissioning of the upgraded ring and a highly stable COD BPM within 5 µm error for 1 month to maintain the optical axis of brilliant x-rays for users [**]. We designed an rf front-end rear transition module (RTM) having band-pass filters, low-noise amplifiers, step attenuators, and calibration tone generators. The rf signal is detected by a 16-bit 370 MSPS high-speed digitizer advanced mezzanine card (AMC) developed for the new low-level rf system of SPring-8 [***]. The firmware of the FPGA on the digitizer AMC was newly developed to implement various functions of the BPM system. We evaluated the readout system at a laboratory and then tested at the present SPring-8 storage ring with a prototype BPM head for the SPring-8 upgrade. We confirmed that the new readout system satisfies the requirements for the single-pass BPM resolution and the COD BPM stability. | |
| Footnotes & References | * SPring-8-II Conceptual Design Report, http://rsc.riken.jp/pdf/SPring-8-II.pdf ** H. Maesaka et al., Proc. IBIC¿18, paper TUOC04. *** T. Ohshima et al., Proc. IPAC¿17, paper THPAB117. |
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| Paper | download WEBO03.PDF [1.521 MB / 4 pages] | |
| Slides | download WEBO03_TALK.PDF [3.340 MB] | |
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |
| Conference | IBIC2019 | |
| Series | International Beam Instrumentation Conferenc (8th) | |
| Location | Malmö, Sweden | |
| Date | 08-12 September 2019 | |
| Publisher | JACoW Publishing, Geneva, Switzerland | |
| Editorial Board | Volker RW Schaa (GSI, Darmstadt, Germany); Andreas Jansson (ESS, Lund, Sweden); Thomas Shea (ESS, Lund, Sweden); Johan Olander (ESS, Lund, Sweden) | |
| Online ISBN | 978-3-95450-204-2 | |
| Online ISSN | 2673-5350 | |
| Received | 04 September 2019 | |
| Accepted | 08 September 2019 | |
| Issue Date | 10 November 2019 | |
| DOI | doi:10.18429/JACoW-IBIC2019-WEBO03 | |
| Pages | 471-474 | |
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