| Paper | Title | Other Keywords | Page |
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| MOPME058 | The Magnet Power Supply for PAL-XFEL | controls, power-supply, FPGA, feedback | 504 |
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| A magnet power supply (MPS) for PAL-XFEL was developed, which is the bipolar type with the power capacity of 3.6KW. The MPS has been implemented by the digital signal processing technology using the DSP, FPGA, ADCs and so on. An embedded module was adapted for the Ethernet connection for EPCIS. The output current stability of the MPS showed about 10 ppm peak-to-peak in long term experiment. The measured accuracy was less than 10ppm in full range. The other experimental results such as repeatability and zero-cross response were given in this paper. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME058 | ||
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| WEPME023 | VIL410, CPI’s 1.3 GHz, 25 kW CW IOT Amplifier System | operation, controls, insertion, cathode | 2305 |
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| The VIL10 Heatwave™ Inductive Output Tube (IOT) amplifier system has been developed to meet the requirements of superconducting RF accelerators. Two VIL410 systems were completed and delivered in April 2014. The VKL9130A1 IOT in the VIL410 provides up to 30 kW RF output power over a 5 MHz bandwidth centered at 1.30 GHz. It operates both CW and pulsed. The VIL410 amplifier has been designed to achieve very tight amplitude and phase control. The amplitude and phase ripple are specified to be better than 0.1% rms and better than 0.2 degrees rms, respectively. The stability of the output power is specified to be better than 0.2% over a 20 second period. In normal operation, smooth control of the output is accomplished via RF input from the low level system. The VIL410 uses CPI’s VSL3616 solid state power amplifier (SSPA) to drive the IOT. The VSL3616 is a 700 watt CW SSPA which operates at 250 watts CW in the VIL410. The VIL410 has an embedded processor that controls all internal functions of the amplifier system and interfaces directly to EPICS. The VIL410 can be operated locally using a LabView PC Host program or remotely by EPICS. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME023 | ||
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| WEPME033 | Search for New e-cloud Mitigator Materials for High Intensity Particle Accelerators | electron, experiment, vacuum, impedance | 2332 |
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| Electron cloud is an ubiquitous effect in positively charged particle accelerators and has been observed to induce unwanted detrimental impacts on beam quality, stability, vacuum etc. A great effort has been recently devoted to the search of new material morphology and/or coatings which can intrinsically mitigate beam instabilities deriving from electron cloud effects. In this context, we present some characterization of Cu foams, available from the market, and their qualification in terms of their vacuum behavior, impedance, secondary electron yield, gas desorption etc. More experimental effort is required to finally qualify foams as a mature technology to be integrated in accelerator environments. But, our preliminary results suggests that, when compatible with geometrical constrains, Cu foams can be utilized when low desorption yields are required and as e-cloud moderator in future particles accelerators. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME033 | ||
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| THPME054 | RF Cavity Design Aspects for a Helical Muon Beam Cooling Channel | cavity, Windows, factory, collider | 3352 |
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Funding: Work supported under U.S. DOE Grant Application Number DE-SC0006266 A Helical Cooling Channel (HCC) promises efficient six-dimensional ionization cooling of muon beams by utilizing high-pressurized gas as a continuous absorber within a magnetic channel embedding RF cavities. The progress on cavity design, tailored for such a cooling channel, is discussed. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME054 | ||
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| THPRI082 | Power Upgrade Studies for the ISIS-TS1 Spallation Target | target, neutron, proton, shielding | 3961 |
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| ISIS is one of the world's most powerful spallation neutron sources for the study of material structures and dynamics. Currently ISIS has two spallation targets, TS1 operating at proton beam powers of up to 200kW, and TS2 operating to 45kW. This paper focuses upon an upgrade study of TS1 with the goal of increasing the ultimate operating power to 1 MW and beyond. During this study we have taken into consideration the necessity of maintaining the spallation neutron pulse width at current values. The increased heat deposition was monitored and the target plates dimensions were modified to take this into account. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI082 | ||
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| THPRI095 | Testing Quality and Metrics for the LHC Magnet Powering System throughout Past and Future Commissioning | framework, hardware, operation, interface | 3995 |
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| The LHC magnet powering system is comprised of thousands of individual components to assure a safe operation when operating with stored energies as high as 10GJ in the superconducting LHC magnets. Each of these components has to be thoroughly commissioned following interventions and machine shutdown periods to assure their protection function in case of powering failures. As well as a dependable tracking of test executions it is vital that the executed commissioning steps and applied analysis criteria adequately represent the operational state of each component. The Accelerator Testing (AccTesting) framework in combination with a domain specific analysis language provides the means to quantify and improve the quality of analysis for future campaigns. Dedicated tools were developed to analyse in detail the reasons for failures and success of commissioning steps in past campaigns and to compare the results with newly developed quality metrics. Observed shortcomings and discrepancies are used to propose additional verification and mitigation for future campaigns in an effort to improve the testing quality and hence assure the overall dependability of subsequent operational periods. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI095 | ||
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