MOOCN4
KEK, Ibaraki, Japan
CLASSE, Ithaca, New York, USA
KEK, Ibaraki, Japan
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MOOCN4 |
Status of the KEKB Upgrade | |
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| In the first half of 2010, KEKB will stop operation for a high-luminosity upgrade that should last about three years. This major reconstruction includes, among other items, a new low-emittance optics, crab-waist collisions, a C-band linac, a damping ring, new vacuum chambers with better electron-cloud mitigation, a "charge swap" between the high- and low-energy rings, etc. The speaker will review the strategy and status of the KEKB upgrade, together with the expected luminosity performance of the upgraded collider. | ||
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Slides MOOCN4 [3.421 MB] | |
| MOP304 | Development of an X-Ray Beam Size Monitor with Single Pass Measurement Capability for CesrTA | 687 |
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| The CESR Test Accelerator (CesrTA) program targets the study of beam physics issues relevant to linear collider damping rings. This endeavor requires new instrumentation to study the beam dynamics along trains of ultra low emittance bunches. A key element of the program has been the development of an x-ray beam size monitor capable of collecting single pass measurements of individual bunches in a train over thousands of turns. This instrument utilizes custom, high bandwidth amplifiers and digitization hardware to collect signals from a linear InGaAs diode array. The digitizer is synchronized with the CESR timing system and is capable of recording beam size measurements for bunches spaced by as little as 4ns. The x-ray source is a bending magnet with Ec=0.6 keV during 2 GeV CesrTA operations. For these conditions the amplifier dynamic range was optimized to allow measurements with 3x109 to 1011 particles per bunch. Initial testing is complete. Data analysis and examples of key measurements which illustrate the instrument's performance are presented. This device offers unique measurement capabilities applicable to future high energy physics accelerators and light sources. | ||