kiwamu.izumi@LIGO.ORG - posted 22:49, Tuesday 02 December 2014 (15401)
comparison of several DC and SB signals with and without TCSX
As requested by Paul, I had a look at some signals of the DRMI to see how much we gained in terms of the recycling gains by the recent TCSX engagement.
In brief, POP_RF18 increased by 8% and ASAIR_RF90 increased by 19% which is good. Naively speaking, the recycling gain for the 9 MHz SB increased by the same factor of 8 % by engaging TCSX. Also, note that the 45 MHz SB used to have a recycling gain of 21 before we started the unclipping effort (see alog 14532).
Below shows a table for side-by-side comparison. Note that the TCSed data is the ones from this after noon, at which point the ASC loop was not optimum for SRC.
| with TCSX (2014-12-02 22:30:14 UTC) in cnts | without TCSX (2014-11-24 2:44:01 UTC) in cnts | ratio (with/without) | |
| POPAIR_A_LF | 1100 | 1000 | 15% |
| POPAIR_B_LF | 600 | 570 | 9 % |
| POPAIR_B_RF18_I | 370 | 355 | 8 % |
| POPAIR_B_RF90_I | 115 | 100 | 20 % |
| ASAIR_A_LF | 9700 | 9400 | 7 % |
| ASAIR_B_LF | 3300 | 3100 | 10 % |
| ASAIR_B_RF90_I | 7200 | 6300 | 19 % |
| IMC_MC2_TRANS_SUM | 777 | 811 | - |