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Daily operation report Jan . 18 -19, 200 3

Daily operation report Jan . 18 -19, 200 3. Physics group II and operation group II. Outline. 1, 24-hour Review 2, Plasmas 3, Systems 4, New Information. 09:30-10:00 10:00 Quench (loss of superconducting state) 12:00 start increasing It 13:40 start plasma testing (It~2000A) 55166

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Daily operation report Jan . 18 -19, 200 3

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  1. Daily operation report Jan.18-19, 2003 Physics group II and operation group II

  2. Outline 1, 24-hour Review 2, Plasmas 3, Systems 4, New Information

  3. 09:30-10:00 10:00 Quench (loss of superconducting state) 12:00 start increasing It 13:40 start plasma testing (It~2000A) 55166 15:00-16:00 water overflow 16:00-21:00 discharge with LHW+IBW(30MHz) 21:00-23:00 synchronous signal horizontal displacement feedback vertical displacement feedback 23:00-04:00 LHCD (since 55238) 04:30-now IBW solo (30MHz)

  4. Quench Max Pouter~1.7E-1 Pa (Commonly ~5E-4 Pa, Palarm is set to 4E-3 Pa) Possible reason

  5. LHCD shots Good Current Drive efficiency at Ip~110kA ne~0.9E19m-3(55264) ~0.5E19m-3(55262) Reference shot: 53808 IPA PLHI DEF VF VPI NE3

  6. At ~110 kW, good particle confinement observed, though no obvious Te increase is observed. Ip~130 kA, ne3~1.3E19m-3. 30MHz IBW shot IPA ICH! NE3 HA1 HA18 HA35

  7. Typical shots LHCD: 55262, 55264 IBW: 54821, 54822, 54844

  8. System • Vacuum system, Inter-shot pressure was ~2.0e-5 Pa. • Water supply, sensor broken • LHW, switches broken • IBW, Maximum power~120 kW

  9. ‘垂直位移反馈控制系统的有关说明’available (相应的处理?) Amplitude of different m value MHD New Information

  10. New Information IPA Z1 MAT0 m=2 m=3 m=4 m=5

  11. Problems 1, Vertical displacement feed-back control abnormal. More than 8 times. Potential threat against long pulses. Problem: Startup relay skip. Solution: At ~04:00, short-circuit the relay. (after 55266) IPA PLVB SB1 PLHI

  12. Abnormal ECE arrays 140eV@-13.9cm 228eV@-15.8cm 23eV@-17.6cm -30eV@-19.4cm 38eV@-21.1cm -14eV@-22.1cm -72eV@-24.3cm 7eV@-25.9cm

  13. 注意! 当放电长时间暂停后,恢复放电前,应检查到平台上下角角落落,确保没有遗漏任何人员在放电现场,方可继续放电. 建议: 钥匙分组. 平台下安装报警灯.

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