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VIS (PRM)
yoshinori.fujii - 11:55 Monday 07 October 2019 (10849) Print this report
A bug? in PRM-MISALIGNED state

raised by Ushiba-san, Kokeyama-san,

= PRM =

  • It was found that current PRM guardian did not complete building mis-aligned stated (it seemed).
    • The symptom was like the following. The input offsets were:
      • 15000 counts at K1:VIS-PRM_BF_TEST_Y_OFFSET
      • 30 counts at K1:VIS-PRM_IM_TEST_Y_OFFSET
      • The oplev had still light on its QPD even in MISALIGNED state.
    • The offset at IMY was -7500 until 14th September 2019, but somehow it went to 30 counts.
  • Could anybody check the current situation quickly?
  • One more quick question for (current) PR suspension experts:
    • why the sign of IMY-offset and BFY-offset is opposite? is this because the axis polarity is different? Can someone please post about this information?
Images attached to this report
Comments to this report:
ayaka.shoda - 13:13 Monday 07 October 2019 (10851) Print this report
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