Paper | Title | Other Keywords | Page |
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MOOB01 | Beam Commissioning of SuperKEKB Rings at Phase-2 | operation, detector, feedback, MMI | 6 |
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The Phase 2 commissioning of SuperKEKB rings with Belle II detector began in Feb. 2018. Staring the commissioning of positron damping ring (DR), the injection and storage of the main rings (HER and LER) smoothly continued in Apr., 2018. The first collision has been achieved on 26th Apr. with the detuned optics (200 mm x 8 mm). Performance of beam instrumentation systems and the difficulties encountered during commissioning time will be shown. | |||
Slides MOOB01 [11.232 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB01 | ||
About • | paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019 | ||
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MOPA02 | Beam Diagnostics for SuperKEKB Damping Ring in Phase-II Operation | injection, radiation, extraction, operation | 29 |
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The SuperKEKB damping ring (DR) commissioning started in February 2018, before main ring (MR) Phase-II operation. We constructed the DR in order to deliver a low-emittance positron beam. The design luminosity of SuperKEKB is 40 times that of KEKB with high current and low emittance. A turn-by- turn beam position monitor (BPM), transverse feedback system, synchrotron radiation monitor (SRM), DCCT, loss monitor using ion chambers, bunch current monitor and tune meter were installed for beam diagnostics at the DR. An overview of the instrumentation and status will be presented. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPA02 | ||
About • | paper received ※ 05 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019 | ||
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TUOC03 | Commissioning of the Open Source Sirius BPM Electronics | electron, electronics, controls, FPGA | 196 |
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The new Brazilian 4th generation light source, Sirius, have already started and commissioning is planned to start in 2018. This paper will report on the manufacturing, deployment and production batch testing of the in-house developed BPM electronics. The latest performance and reliability achievements will be presented. | |||
Slides TUOC03 [14.606 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC03 | ||
About • | paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019 | ||
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WEPA01 | A MicroTCA.4 Timing Receiver for the Sirius Timing System | controls, feedback, interface, hardware | 375 |
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The AMC FMC carrier (AFC) is a MicroTCA.4 AMC board which has a very flexible clock circuit that enables any clock source to be connected to any clock input, including telecom clock, FMC clocks, programmable VCXO oscillator and FPGA. This paper presents the use of the AFC board as an event receiver connected to the Sirius timing system to provide low jitter synchronized clocks and triggers for Sirius BPM electronics and other devices. | |||
Poster WEPA01 [3.299 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA01 | ||
About • | paper received ※ 04 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019 | ||
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WEPA13 | Electro-Optic Modulator Based Beam Arrival Time Monitor for SXFEL | FEL, electron, pick-up, laser | 396 |
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Beam arrival time monitor (BAM) is an important tool to investigate the temporal characteristic of elec-tron bunch in free electron laser (FEL) like Shanghai soft X-ray Free Electron Laser (SXFEL). Since the timing jitter of electron bunch will affect the FEL’s stability and the resolution of time-resolved experi-ment at FELs, it is necessary to precisely measure the electron bunch arrival time so as to reduce the timing jitter of the electron bunch with beam based feedback. The beam arrival time monitor based on electro-optic modulator (EOM) is already planned and will be de-veloped and tested at SXFEL in the next three years. Here the design and preliminary results of the EOM based beam arrival time monitor will be introduced in this paper. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA13 | ||
About • | paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019 | ||
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WEPB06 | Time-Synchronous Measurements of Transient Beam Dynamics at SPEAR3 | feedback, diagnostics, controls, synchrotron | 441 |
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Funding: Work supported by the China Scholarship Council and the US Department of Energy Contract DE-AC03-76SF00515, Office of Basic Energy Sciences. Multi-bunch beam instabilities can often be controlled with high-speed digital bunch-by-bunch feedback systems. The detected motion is based on charge centroid measurements that, for short bunches, cannot resolve intrabunch charge dynamics. To compliment the BxB data, we installed a fast-gated camera with a rotating mirror to sweep visible-light synchrotron radiation across the camera CCD. The SR measurements present a complimentary view of the motion. For this work we generated transient beam events in SPEAR3 using the BxB feedback system and synchronously observed the motion on the camera. Results are presented for a high-order multibunch beam instability and for single bunch drive-damp experiments. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB06 | ||
About • | paper received ※ 07 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019 | ||
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THOA02 | High-Speed Direct Sampling FMC for Beam Diagnostic and Accelerator Protection Applications | interface, FPGA, controls, diagnostics | 534 |
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The rapid development in the field of digitizers is leading to Analog-to-Digital Converters (ADC) with ever higher sampling rates. Nowadays many high-speed digitizers for RF applications and radio communication are available, which can sample broadband signals, without the need of down converters. These ADCs fit perfectly into beam instrumentation and diagnostic applications, e.g. Bunch Arrival time Monitor (BAM), klystron life-time management or continuous wave synchronization. To cover all these high-frequency diagnostic applications, DESY has developed a direct sampling FMC digitizer board based on a high-speed ADC with an analog input bandwidth of 2.7 GHz. A high-speed data acquisition system capable of acquiring 2 channels at 800 MSP/s will be presented. As first model application of the versatile digitizer board is the coarse bunch arrival time diagnostics in the free electron laser FLASH at DESY. | |||
Slides THOA02 [5.817 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-THOA02 | ||
About • | paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019 | ||
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