| Paper | Title | Page |
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| WEPOR058 | Preliminary Study for the HLS Variable Pulse Length Storage Ring by Two Harmonic Cavities | 2802 |
| SUPSS011 | use link to see paper's listing under its alternate paper code | |
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| The 4th harmonic cavity is successfully used in HLS II to increase the beam lifetime and suppress the beam instability now. At the future, a scheme of the two higher harmonic cavities may be applied in Hefei light source for a variable electron pulse length storage ring (HLS VSR). With optimal RF system parameters, 45 ps long bunches and 6 ps short bunches may be stored simultaneously in the HLS storage ring. The ratio of the bunch number for 45 ps to the one for 6 ps is 1:2. Particle tracking calculations are performed to simulate the longitudinal phase space of the new system and to track the process of shortening bunches with Elegant Software. Moreover, a tracking simulation code for RF systems is developed in MALAB to study transient beam loading which affects bunch length, phase stability, and longitudinal muti-bunch oscillation for different fill patterns. In the end, the preliminary design of the two harmonic cavities for longitudinal bunch focusing is given. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR058 | |
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| THPOW011 | The Measurement System of the Electron Gun with Double-anode Structure | 3954 |
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Funding: National Natural Science Foundation of China(11175181); National Natural Science Foundation of China(10875116) The double-anode structure with an intermediate electrode has been proposed to overcome the strong space-charge force on the cathode and improve the transverse focusing, which make the goal of high perveance and high compression ratio achieved. This gun plays a key role as the external injecting electron source of the independently-tunable-cells (ITC) RF gun. In order to understand the quality of the beam, a measurement system has been designed. The papers present the measurement system and the result of the test. |
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| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW011 | |
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| THPOW013 | ARM-Based Controller of Power Supply for Focus Solenoid of Klystron | 3957 |
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Funding: Supported by the National Science Foundation of China 11175181 By the Fundamental Research Funds for the Central Universities WK2310000056 Klystrons are widely used in accelerators to provide powerful microwave power to the accelerating structure of linac to accelerate particles. The stability of a klystron is affected by the beam quality of high voltage gun of the klystron. The focus solenoid is needed to provide focus magnetic field around the klystron. ARM-based high performance of current stability power supply is designed to improve the quality of focus magnetic field of klystron, with a two-loop-hybrid design, which could achieve fast dynamic response and high static stability performance, instead of analogue power supply design. The bench test of the ARM-based controlled is done and the commissioning of the controller needs be done in future study. |
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| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW013 | |
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