CAL measurement plan for O4a
Table of Contents
1 measurement plan
- Before and after observing run
- Full procedure, [1-19], will be done as MICH, PRCL, and DARM calibration.
- Only [1,2], [5-11] and [17-19] (totally 12 items) are enough for the DARM calibration by pcal and FSM.
- During observing run
- Only [8-11] (totally 4 items) will be done as the weekly DARM calibration by pcal.
1.1 Expected measurement time
| Procedure | meas. | interval | total |
|---|---|---|---|
| Full | 285min. | 95min. | 380min. |
| only DARM | 170min. | 55min. | 225min. |
| Weekly | 85min. | 15min. | 100min. |
- Interval of each measurement is expected as ~5min.
- If lockloss is occurred, loss-time is ~15min./lockloss.
- Some of measurements must be done in a same locked segment.
- So one lockloss may become ~hrs loss-time.
- If initial alignment is needed, additional ~1.5hrs. is required.
1.2 Measurements items
| No | IFO | EXC | A | B | Results | Memo | Time |
|---|---|---|---|---|---|---|---|
| [1] | FSM | - | LSC-REFL_PDA2_RF51_Q_ERR | LSC-REFL_PDA2_DC_OUT | C_mich | 10min. | |
| [2a] | MICH | LSC-MICH1_EXC | LSC-MICH1_IN2 | LSC-MICH1_IN1 | -G_mich | 15min. | |
| [2b] | LSC-MICH_OUT | LSC-MICH_IN1 | -A_bs_full_mich * C_mich | A_bs_full_mich = sqrt(2) * A_bs | |||
| [2c] | LSC-MICH1_EXC | LSC-MICH1_IN2 | 1 / (1 + G_mich) | ||||
| [3] | MICH | BS_TM_CAL_EXC | BS_TM_CAL_EXC_OUT | LSC-MICH_IN1 | A_bs_tm_mich * C_mich / (1 + G_mich) | A_bs_tm_mich = sqrt(2) * A_bs_tm | 15min. |
| [4] | MICH | BS_IM_CAL_EXC | BS_IM_CAL_EXC_OUT | LSC-MICH_IN1 | A_bs_im_mich * C_mich / (1 + G_mich) | A_bs_im_mich = sqrt(2) * A_bs_im | 20min. |
| [5] | MICH | ITMX_TM_CAL_EXC | ITMX_TM_CAL_EXC_OUT | LSC_MICH_IN1 | A_itmx_tm_mich * C_mich / (1 + G_mich) | A_itmx_tm_mich = A_itmx_tm | 15min. |
| [6a] | PRFPMI | LSC-DARM1_EXC | LSC-DARM1_IN2 | LSC-DARM1_IN1 | -G_DARM | 15min. | |
| [6b] | LSC-DARM_OUT | LSC-DARM_IN1 | -A_etmx_full_DARM * C_DARM | A_etmx_full_DARM = -A_etmx | |||
| [6c] | LSC-DARM1_EXC | LSC-DARM1_IN2 | 1 / (1 + G_DARM) | ||||
| [7] | PRFPMI | ITMX_TM_CAL_EXC | ITMX_TM_CAL_EXC_OUT | LSC_DARM_IN1 | A_itmx_tm_DARM * C_DARM / (1 + G_DARM) | A_itmx_tm_DARM = -A_itmx_tm | 15min. |
| [8] | PRFPMI | ETMX_TM_CAL_EXC | ETMX_TM_CAL_EXC_OUT | LSC_DARM_IN1 | A_etmx_tm_DARM * C_DARM / (1 + G_DARM) | A_etmx_tm_DARM = -A_etmx_tm | 15min. |
| [9] | PRFPMI | ETMX_IM_CAL_EXC | ETMX_IM_CAL_EXC_OUT | LSC_DARM_IN1 | A_etmx_im_DARM * C_DARM / (1 + G_DARM) | A_etmx_im_DARM = -A_etmx_im | 20min. |
| [10] | PRFPMI | ETMX_MN_CAL_EXC | ETMX_MN_CAL_EXC_OUT | LSC_DARM_IN1 | A_etmx_mn_DARM * C_DARM / (1 + G_DARM) | A_etmx_mn_DARM = -A_etmx_mn | 20min. |
| [11] | PRFPMI | PCAL_EX_0_INJ_V_EXC | K1:CAL-PCAL_EX_1_PD_RX_TOTAL_W | LSC-DARM_IN1 | A_pcal * C_DARM / (1 + G_DARM) | 15min. | |
| [12a] | PRFPMI | LSC-MICH1_EXC | LSC-MICH1_IN2 | LSC-MICH1_IN1 | -G_MICH | 15min. | |
| [12b] | LSC-MICH_OUT | LSC-MICH_IN1 | -A_bs_full_MICH * C_MICH | A_bs_full_MICH = sqrt(2) * A_bs | |||
| [12c] | LSC-MICH1_EXC | LSC-MICH1_IN2 | 1 / (1 + G_MICH) | ||||
| [13a] | PRFPMI | LSC-PRCL1_EXC | LSC-PRCL1_IN2 | LSC-PCRL1_IN1 | -G_PRCL | 15min. | |
| [13b] | LSC-PRCL_OUT | LSC-PRCL_IN1 | -A_prm_full_PRCL * C_PRCL | A_prm_full_PRCL = -A_prm | |||
| [13c] | LSC-PRCL1_EXC | LSC-PRCL1_IN2 | 1 / (1 + G_PRCL) | ||||
| [14] | PRFPMI | BS_TM_CAL_EXC | BS_TM_CAL_EXC_OUT | LSC_PRCL_IN1 | A_bs_tm_PRCL * C_PRCL / (1 + G_PRCL) | A_bs_tm_PRCL = -A_bs_tm / sqrt(2) | 15min. |
| [15] | PRFPMI | PRM_TM_CAL_EXC | PRM_TM_CAL_EXC_OUT | LSC_PRCL_IN1 | A_prm_tm_PRCL * C_PRCL / (1 + G_PRCL) | A_prm_tm_PRCL = -A_prm_tm | 15min. |
| [16] | PRFPMI | PRM_IM_CAL_EXC | PRM_IM_CAL_EXC_OUT | LSC_PRCL_IN1 | A_prm_im_PRCL * C_PRCL / (1 + G_PRCL) | A_prm_im_PRCL = -A_prm_im | 20min. |
| [17] | - | - | K1:IOP-EX1_ADC_DT | K1:IOP-EX1_DAC_DT | τ_A_dac | 10min. | |
| [18] | - | - | K1:IOP-EX0_ADC_DT | - | τ_Px_adc | 10min. | |
| K1:IOP-EY0_ADC_DT | - | τ_Py_adc | |||||
| [19] | - | - | K1:IOP-OMC0_ADC_DT | - | τ_C_adc | 10min. | |
| K1:IOP-LSC0_ADC_DT | - |
- Excitations from
VIS-(optic)_TM_ISCINF_L_EXCis better than fromLSC-(dof)_EXCfor the OLTF measurements.- TF from
VIS-(optic)_TM_ISCINF_L_EXCtoLSC-(dof)_EXCrepresentsA_optic * C_dof / (1 + G_dof)
- TF from
- Note
A_(optic)_full = VIS-(optic)_(stage)_ISCINF_L * \sum( VIS-(optic)_(stage)_LOCK_L * A_(optic)_(stage) )A_pcal = 2 * P / (c * M * (2 * \pi * f)^2 )
1.3 Calculation
| Params | Free-Swinging | Pcal |
|---|---|---|
| A_itmx_tm | [5] / [2c] / [1] | -[7] / [11] * A_pcal |
| A_etmx_tm | [8] / [7] * A_itmx_tm | -[8] / [11] * A_pcal |
| A_etmx_im | [9] / [7] * A_itmx_tm | -[9] / [11] * A_pcal |
| A_etmx_mn | [10] / [7] * A_itmx_tm | -[10] / [11] * A_pcal |
| C_DARM | [6b] / (ISCINF * ∑(LOCK * A_etmx_(stage)) | [11] / [6c] / A_pcal |
| A_bs_tm | [3] / [2c] / [1] / sqrt(2) | [3] / [5] * A_itmx_tm / sqrt(2) |
| A_bs_im | [4] / [2c] / [1] / sqrt(2) | [4] / [5] * A_itmx_im / sqrt(2) |
| C_MICH | -[12b] / (ISCINF * ∑(LOCK * A_bs_(stage)) / sqrt(2) | same on the left |
| A_prm_tm | [15] / [14] * A_bs_tm / sqrt(2) | same on the left |
| A_prm_im | [16] / [14] * A_bs_tm / sqrt(2) | same on the left |
| C_PRCL | [13b] / (ISCINF * ∑(LOCK * A_prm_(stage)) | same on the left |