Crab Cavity Development
نویسندگان
چکیده
The HL-LHC upgrade will use deflecting (or crab) cavities to compensate for geometric luminosity loss at low * and non-zero crossing angle. A local scheme with crab cavity pairs across the IPs is used employing compact crab cavities at 400 MHz. Design of the cavities, the cryomodules and the RF system is well advanced. The LHC crab cavities will be validated initially with proton beam in the SPS.
منابع مشابه
Multipacting Analysis for the Half-wave Spoke Resonator Crab Cavity for Lhc*
A compact 400-MHz half-wave spoke resonator (HWSR) superconducting crab cavity is being developed for the LHC upgrade. The cavity shape and the LOM/HOM couplers for such a design have been optimized to meet the space and beam dynamics requirements, and satisfactory RF parameters have been obtained. As it is known that multipacting is an issue of concern in a superconducting cavity which may lim...
متن کاملStudy of crab cavity option for LHC
It is prefered to make a larger crossing angle to avoid parasitic collisions between beams in LHC. The transverselongitudinal aspect ratio of the LHC beam is 17 μm/7.5 cm=0.23 × 10−3. Crossing angle larger than the aspect ratio causes geometrical degradation of luminosity. Crab cavity can realizes head-on collision without crossing angle effectively, with the result that it recovers these lumin...
متن کاملSynchro-Betatron Stop-Bands due to a Single Crab Cavity
We analyze the stop-band due to crab cavities for horizontal tunes that are either close to integers or close to half integers. The latter case is relevant for today’s electron/positron colliders. We compare this stop-band to that created by dispersion in an accelerating cavity and show that a single typical crab cavity creates larger stop-bands than a typical dispersion at an accelerating cavi...
متن کاملX-band Crab Cavities for the Clic Beam Delivery System
The CLIC machine incorporates a 20 mrad crossing angle at the IP to aid the extraction of spent beams. In order to recover the luminosity lost through the crossing angle a crab cavity is proposed to rotate the bunches prior to collision. The crab cavity is chosen to have the same frequency as the main linac (11.9942 GHz) as a compromise between size, phase stability requirements and beam loadin...
متن کاملStatus of the Ilc Crab Cavity Development
The International Linear Collider (ILC) will require two dipole cavities to “crab" the electron and positron bunches prior to their collision. It is proposed to use two 9 cell SCRF dipole cavities operating at a frequency of 3.9 GHz, with a transverse gradient of 3.8MV/m in order to provide the required transverse kick. Extensive numerical modelling of this cavity and its couplers has been perf...
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