= Type-A Tower ITMY Specification = <> ---- == IP == {{attachment:IP_SM,LV_IX,IY.png||width="600"}} === Accelerometer (ACC) === Geophone (GEO) is to be replaced by ACC in ITMX and ITMY. ## * Measurements for characterization >>> /*[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=3893|klog #3893]]*/ ==== Frequency response ==== Geophone's frequency response to the ground velocity: ## {{attachment:KAGRA/Subgroups/VIS/TypeA/ETMX/texclip20171227223533.png||width=350}} ## * Ge: Generator constant [V/(m/s)] ## * η: Intrinsic damping ratio ## * ω0: Resonant angular frequency [rad/s] ||'''Sensor'''||'''S/N'''||'''Quality factor'''||'''Resonant frequency [Hz]'''|| || ACC H1 || # || || || || ACC H2 || # || || || || ACC H3 || # || || || {{attachment:respGEOall20171220.png||width=500}} ==== Noise ==== ||'''Sensor'''||'''Noise [m/rtHz] @ 0.1 Hz'''||'''Noise [m/rtHz] @ 10 Hz'''|| || ACC H1 || || || || ACC H2 || || || || ACC H3 || || || {{attachment:psdGEOnoiseVel20171220.png||width=500}} {{attachment:psdGEOnoiseDisp20171220.png||width=500}} ==== Calibration ==== * Converted displacement [um] = 3.052 x 10^-4^ [V/cnt] / H,,GEO,,(ω) / (gainPreamp) x (DC cutoff) x 1/s (m/(m/s)) x 10^6^ /* {{attachment:tfmdlITMY_GEOH1calib20180205.png||width=500}} */ ## !!OBSOLETE!! ## === Accelerometer (ACC) === ## ## ||'''Sensor'''||'''Efficiency [(um/s^2)/cnt]'''|| ## || ACC H1 (SN7) ||<)> -5.288 || ## || ACC H2 (SN8) ||<)> 5.830 || ## || ACC H3 (SN5) ||<)> -5.289 || ## {{attachment:calibACC_sn7_20171016.png||width=33%,align="left"}} ## {{attachment:calibACC_sn8_20171016.png||width=33%,align="center"}} ## {{attachment:calibACC_sn5_20171017.png||width=33%,align="right"}} === LVDT === ||'''Sensor'''||'''Efficiency [um/cnt]'''|| || LVDT H1 ||<)> || || LVDT H2 ||<)> || || LVDT H3 ||<)> || /* {{attachment:calibLVDT_ITMY_IPH1_20171012.png||width=33%,align="left"}} */ /* {{attachment:calibLVDT_ITMY_IPH2_20171012.png||width=33%,align="center"}} */ /* {{attachment:calibLVDT_ITMY_IPH3_20171012.png||width=33%,align="right"}} */ === Actuator polarization === Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator. * COIL H1: * COIL H2: * COIL H3: === Diagonalization matrix === * LVDT2EUL '''(To be updated)''' ||'''H1'''||'''H2'''||'''H3'''||'''To:'''|| || 0.6666 || -0.3333 || -0.3333 ||''Long.'' || || 0 || -0.5774 || 0.5774 ||''Trans.''|| || 0.56111 || 0.56111 || 0.56111 ||''Yaw'' || * ACC2EUL '''(To be updated)''' ||'''H1'''||'''H2'''||'''H3'''||'''To:'''|| || 0.64400 || -0.17250 || -0.4714 ||''Long.''|| || 0.17250 || -0.6440 || 0.47140 ||''Trans.''|| || 0.56348 || 0.56348 || 0.56348 ||''Yaw'' || * EUL2COIL '''(To be updated)''' ||'''Long.'''||'''Trans.'''||'''Yaw'''||'''To:'''|| || 0.5 || 0 || 0.594 ||''H1''|| || -0.25 || -0.5 || 0.594 ||''H2''|| || -0.25 || 0.5 || 0.594 ||''H3''|| === Stepper motor === ''See also:'' [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS/Projects/StepperMotor|Stepper motor setup]] ||<:-6> ''Epics channel name: K1:STEPPER_IXV_***'' || ||<:-6> ''Driver IP address: 10.68.150.**'' || ||'''Motor 0'''||'''Motor 1'''||'''Motor 2'''||'''Motor 3'''||'''Motor 4'''||'''Motor 5'''|| || F0 Yaw || IP H1 || IP H2 || IP H3 ||''''||''''|| == GAS == === LVDT === ||'''Sensor'''||'''Efficiency [um/cnt]'''|| || F0 LVDT GAS ||<)> || || F1 LVDT GAS ||<)> || || F2 LVDT GAS ||<)> || || F3 LVDT GAS ||<)> || || BF LVDT GAS ||<)> || /* {{attachment:calibLVDT_ETMX_F0GAS20171012.png||width=33%,align="left"}} */ /*{{attachment:calibLVDT_ETMX_F1GAS20170907.png||width=33%,align="center"}} */ /*{{attachment:calibLVDT_ETMX_F2GAS20170822.png||width=33%,align="right"}} */ /*{{attachment:calibLVDT_ETMX_F3GAS20170803.png||width=33%,align="left"}} */ /*{{attachment:calibLVDT_ETMX_BFGAS20170725.png||width=33%,align="center"}}*/ === Fishing Rod (stepper motor) === ''See also:'' [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS/Projects/StepperMotor|Stepper motor setup]] ==== Motor driver ==== '''(To be updated)''' ||<:-6> ''Epics channel name: K1:STEPPER_EXV_GAS'' || ||<:-6> ''Driver IP address: 10.68.150.45'' || ||'''Motor 0'''||'''Motor 1'''||'''Motor 2'''||'''Motor 3'''||'''Motor 4'''||'''Motor 5'''|| || F0 GAS || F1 GAS || F2 GAS || F3 GAS || BF GAS ||''''|| ==== Property ==== '''(To be updated)''' || ||'''F0 GAS'''||'''F1 GAS'''||'''F2 GAS'''||'''F3 GAS'''||'''BF GAS'''|| || Movable range || mm (± mm) ||''(TBC)''||''(TBC)''||''(TBC)''|| full range (± 5.5 mm) || || +step direction || down || down || down || down || down || == BF == {{attachment:KAGRA/Subgroups/VIS/TypeA/ETMX/BFconfig_ETMXv2.png}} === LVDT (BF Damper) === ||'''Sensor'''||'''Efficiency [um/cnt]'''|| || LVDT V1 ||<)> || || LVDT V2 ||<)> || || LVDT V3 ||<)> || || LVDT H1 ||<)> || || LVDT H2 ||<)> || || LVDT H3 ||<)> || Note: The polarities are determined to output positive signals when the BF shifts respectively to +vertical/+yaw direction for Vertical/Horizontal LVDTs. {{attachment:IX-BFLVDT-calibration_V1.png||width=33%,align="left"}} {{attachment:IX-BFLVDT-calibration_V2.png||width=33%,align="center"}} /* {{attachment:calibLVDT_ETMX_BFV3_20170803.png||width=33%,align="right"}} */ /* {{attachment:calibLVDT_ETMX_BFH1_20170802.png||width=33%,align="left"}} */ /* {{attachment:calibLVDT_ETMX_BFH2_20170802.png||width=33%,align="center"}} */ /* {{attachment:calibLVDT_ETMX_BFH3_20170802.png||width=33%,align="right"}} */ === Actuator polarization === Polarity is determined so that an +offset at the COILOUTF applies +yaw force in each actuator. * COIL V1: * COIL V2: * COIL V3: * COIL H1: * COIL H2: * COIL H3: Note: Polarity may change when connecting the secondary coil to the cable. This configuration is confirmed on [2017.10.27] === Diagonalization matrix === * LVDT2EUL '''(To be updated)''' ||'''V1'''||'''V2'''||'''V3'''||'''H1'''||'''H2'''||'''H3'''||'''To:''' || || 0 || 0 || 0 ||-0.6667 || 0.3333 || 0.3333 ||''Long.'' || || 0 || 0 || 0 || 0 || 0.5774 ||-0.5774 ||''Trans.''|| || 0.3333 || 0.3333 || 0.3333 || 0 || 0 || 0 ||''Vert.'' || || 0.9158 || 0.9158 ||-1.8315 || 0 || 0 || 0 ||''Roll'' || || 1.5861 ||-1.5861 || 0 || 0 || 0 || 0 ||''Pitch'' || || 0 || 0 || 0 || 0.8170 || 0.8170 || 0.8170 ||''Yaw'' || * EUL2COIL '''(To be updated)''' ||'''L''' ||'''T''' ||'''V''' ||'''R''' ||'''P''' ||'''Y''' ||'''To:'''|| || 0 || 0 || 1. || 0.1820 || 0.3152 || 0 ||''V1''|| || 0 || 0 || 1. || 0.1820 ||-0.3152 || 0 ||''V2''|| || 0 || 0 || 1. ||-0.3640 || 0 || 0 ||''V3''|| ||-1 || 0 || 0 || 0 || 0 || 0.4080 ||''H1''|| || 0.5 || 0.8660 || 0 || 0 || 0 || 0.4080 ||''H2''|| || 0.5 ||-0.8660 || 0 || 0 || 0 || 0.4080 ||''H3''|| === Picomotor === ''See also:'' [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/DGS/Projects/PicoMotor|Picomotor digital setup]] '''(To be updated)''' ||<:-3> ''Epics channel name: K1:PICO_ITMY'' || ||<:-3> ''Driver IP address: 10.68.150.**'' || ||'''CH1'''||'''CH2'''||'''CH3'''|| || BF moving mass A || BF moving mass B || Payload yaw || * BF moving masses (both A and B ) are currently disabled because of weight limit for upper GAS stages