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  Coating Ring-down Measurement Lab elog  Not logged in ELOG logo
Message ID: 164     Entry time: Mon Nov 7 10:39:08 2016
Author: Gabriele 
Type: General 
Category: Measurements 
Subject: S1600457 

2016-11-07

  • 10:30am, re-aligned optical system to horizontal reference
  • 10:37am, in chamber balanced
  • 10:38am, started roughing pump
  • 10:52am, started turbo pump, pressure was <2 Torr
    • disk got briefly excited when the pump was at ~60 Hz, and again at ~200 Hz,
    • centered QPD with picomotors at 10:54am,49
    • pump at 500 Hz at 10:55am, no more disk excitations.
    • IGM on at 10:55am, disk moved briefly afterwards, not sure if correlated since the IGM controlled is still showing "STARTING".
    • Disk definitely moved at 10:57:40, when the IGM controller started showing pressure.
      IGM switched off at 10:58:45am, disk is not going back!
    • QPD recentered using picomotors.
    • IGM on again at 11:00am, no disk displacement this time.
  • 12:20pm:
    • quiet time before excitation 1162585209
    • excitation
    • quiet time after excitation 1162585348
  • 1:49pm: excitation again, 2kV, quiet time after 1162585348
  • In both the previous excitations the QPD got misaligned at the beginning, resulting in not very good ring-downs
  • Another trial at 1162597014, amplitud 1.5kV. Somebody switched on the light in the lab...
  • pumps stopped at 4:09pm

Results

2016-11-07 A

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
1109.0        6.0358e+06        6.0221e+06        6.0496e+06
2543.3        2.8271e+06        2.8234e+06        2.8309e+06
2581.0        9.1904e+05        9.1711e+05        9.2097e+05
2619.5        7.6167e+05        7.4294e+05        7.8136e+05
3413.6        1.1513e+06        1.1511e+06        1.1514e+06
4390.0        2.5891e+06        2.5308e+06        2.6501e+06
4428.7        2.4948e+06        2.4938e+06        2.4958e+06
4467.4        2.6014e+06        2.5551e+06        2.6494e+06
6754.1        1.9049e+06        1.8972e+06        1.9126e+06
6770.9        6.5053e+06        6.4828e+06        6.5279e+06
6825.1        9.5015e+05        9.4829e+05        9.5201e+05
10206.7        7.1637e+06        7.1482e+06        7.1792e+06
12689.2        1.3788e+06        1.3788e+06        1.3789e+06
14169.7        5.2321e+06        5.1965e+06        5.2682e+06
16078.8        1.3844e+06        1.3844e+06        1.3844e+06
16089.5        7.6177e+06        7.5997e+06        7.6358e+06
16289.4        1.1658e+06        1.1658e+06        1.1658e+06
18631.4        2.4582e+06        2.4581e+06        2.4582e+06
20268.5        9.5666e+05        9.5663e+05        9.5668e+05
21348.3        1.2590e+07        1.2590e+07        1.2590e+07
23561.2        2.9089e+06        2.9088e+06        2.9090e+06
27121.0        5.1018e+06        5.1017e+06        5.1019e+06

2016-11-07 B

% Freq        Q                 Q (C.I. 95%)      Q (C.I. 95%)
1109.0        6.0358e+06        6.0221e+06        6.0496e+06
2543.3        2.8271e+06        2.8234e+06        2.8309e+06
2581.0        9.1904e+05        9.1711e+05        9.2097e+05
2619.5        7.6167e+05        7.4294e+05        7.8136e+05
3413.6        1.1513e+06        1.1511e+06        1.1514e+06
4390.0        2.5891e+06        2.5308e+06        2.6501e+06
4428.7        2.4948e+06        2.4938e+06        2.4958e+06
4467.4        2.6014e+06        2.5551e+06        2.6494e+06
6754.1        1.9049e+06        1.8972e+06        1.9126e+06
6770.9        6.5053e+06        6.4828e+06        6.5279e+06
6825.1        9.5015e+05        9.4829e+05        9.5201e+05
10206.7        7.1637e+06        7.1482e+06        7.1792e+06
12689.2        1.3788e+06        1.3788e+06        1.3789e+06
14169.7        5.2321e+06        5.1965e+06        5.2682e+06
16078.8        1.3844e+06        1.3844e+06        1.3844e+06
16089.5        7.6177e+06        7.5997e+06        7.6358e+06
16289.4        1.1658e+06        1.1658e+06        1.1658e+06
18631.4        2.4582e+06        2.4581e+06        2.4582e+06
20268.5        9.5666e+05        9.5663e+05        9.5668e+05
21348.3        1.2590e+07        1.2590e+07        1.2590e+07
23561.2        2.9089e+06        2.9088e+06        2.9090e+06
27121.0        5.1018e+06        5.1017e+06        5.1019e+06
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