High Power X-band RF Test Stand Development and High Power Testing of the CLIC Crab Cavity PDF Download
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Author: Benjamin Woolley
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Languages : en
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Author: Benjamin Woolley
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Languages : en
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Author: Amelia Edwards
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Languages : en
Pages : 0
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Languages : en
Pages : 3
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The CLIC Power Extraction and Transfer Structure (PETS) is a passive microwave device in which bunches of the drive beam interact with the impedance of the periodically loaded waveguide and generate RF power for the main linac accelerating structure. The demands on the high power production (≈ 150 MW) and the needs to transport the 100 A drive beam for about 1 km without losses, makes the PETS design rather unique and the operation very challenging. In the coming year, an intense PETS testing program will be implemented. The target is to demonstrate the full performance of the PETS operation. The testing program overview and test results available to date are presented.
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Languages : en
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Author: Tadashi Koseki
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Languages : en
Pages : 6
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Languages : en
Pages : 3
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A single-cavity test cryostat is used to conduct pulsed high power RF tests of superconducting 1.3 GHz RF cavities at 2 K. The cavities under test are welded inside individual helium vessels and are outfitted ('dressed') with a fundamental power coupler, higher-order mode couplers, magnetic shielding, a blade tuner, and piezoelectric tuners. The cavity performance is evaluated in terms of accelerating gradient, unloaded quality factor, and field emission, and the functionality of the auxiliary components is verified. Test results from the first set of dressed cavities are presented here.
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Languages : en
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Languages : en
Pages : 5
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The successful design of high power windows play an essential role in RF power source development in accelerator programs such as the Next Linear Collider (NLC). Different window design approaches have been developed at several institutions to develop a successful high power window design. Some of the design considerations include the utilization of low loss RF modes, multiple RF modes and different window materials. In the past year some of these designs have been tested at SLAC using a pair of 50+ MW X-band klystrons as power sources. This permitted testing to power levels exceeding 100 MW at pulse widths ranging from 0.15 to 1.5 microseconds. We will present results of these tests including their RF performance and their optical and x-ray emission characteristics as a function of pulse width and power levels.
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Languages : en
Pages : 29
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Languages : en
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The CLIC RF frequency has been changed in 2008 from the initial 30 GHz to the European X-band 11.9942 GHz permitting beam independent power production using klystrons for CLIC accelerating structure testing. A design and fabrication contract for five klystrons at that frequency has been signed by different parties with SLAC. France (IRFU, CEA Saclay) is contributing a solid state modulator purchased in industry and specific 12 GHz RF network components to the CLIC study. RF pulses over 120 MW peak at 230 ns length will be obtained by using a novel SLED-I type pulse compression scheme designed and fabricated by IAP, Nizhny Novgorod, Russia. The X-band power test stand is being installed in the CLIC Test Facility CTF3 for independent structure and component testing in a bunker, but allowing, in a later stage, for powering RF components in the CTF3 beam lines. The design of the facility, results from commissioning of the RF power source and the expected performance of the Test Facility are reported.
