AdL SUS/US Quad Controls Conceptual Design J. Heefner 7/12/2005 LIGO-G050318-00-C
AdL SUS Controls Conceptual Design � Design Considerations » AdL Controls Architecture has yet to be determined – Controls block diagram based on scaling of existing LIGO controls and architecture along with present DSpace controls » AdL Controls ADCs, DACs, BIO, etc. have yet to be determined – Requirements for ADC input noise based on recent testing of the Analog Devices AD7679 – Requirements for DAC output noise based on experience with the VME-based Frequency Devices DAC module – Requirements for Binary I/O based on experience with VME, PCI and PC104 based binary I/O modules � This design primarily focuses on interface between US and UK and the feasibility of implementing the required design using LIGO-like controls. 2 AdLIGO LIGO-G050318-00-C
AdL Quad Controls Requirements � The requirements for the system can be found in the Universal DRD, T000053-03. � Highlights of electronics requirements: » ADC- – Input Voltage: +/-10 volts, differential – Input Impedance: >1Kohm – Input-referred noise: <200nV/ √ Hz for freq>100Hz, 200nV/ √ Hz @10Hz[1] – Sample Rate: 16384 samples/second, nominal – CMRR: >68dB at 100KHz [1] The numbers for the input referred noise voltage of the ADC are based on tests recently conducted on the Analog Devices AD7679 ADC. In these tests, it was found that the input referred noise voltage of the ADC is less than 100nV/ √ Hz for freq>10Hz, but the input range was +/-5 Volts. 3 AdLIGO LIGO-G050318-00-C
Requirements cont’d » DAC – Output Voltage: +/-10 volts, differential – Drive capability: 1Kohm load shunted by 1000pF capacitance – Output-referred noise: 200nV/ √ Hz for freq>100Hz, TBD @10Hz[1] – Sample Rate: 16384 samples/second, nominal [1] Output noise voltage for DACs is based on measured output noise of the present LIGO VME-based DACs manufactured by Frequency Devices. » Binary Out – Switching Voltage: 5 volts minimum, 30 volts maximum – Switching Current: 1 amp maximum – Switching Time: < 1milli-seconds – On-state voltage: 2 volts maximum 4 AdLIGO LIGO-G050318-00-C
Requirements cont’d » Binary In – On-State voltage (logical 1): > 2 volts – Off-state voltage (logical 0): <0.8 volts – Maximum input voltage: TBD – Input impedance: >1Kohm » Status Readback – The state of a circuit must be capable of being read back to the controlling hardware. The success of all binary instructions to a module from CDS must be verifiable via a return signal derived from the controlled hardware. » Propagation of Signals – Shielded-twisted pairs – Coax 5 AdLIGO LIGO-G050318-00-C
Requirements cont’d » Test points- Internal and external test points required to aid in debug, testing and verification » Circuit Protection- Circuits must protect themselves against reversed power, missing power supplies, shorts, opens, etc. » Local Voltage Regulation » Modularity and Commonality of parts 6 AdLIGO LIGO-G050318-00-C
ISC/SUS Block Diagram ISC AND SUS INTERFACE BLOCK DIAGRAM 5 BSC Systems per IFO SUPERVISORY CONTROL MODULATION Input Optics (IO) 6 HAM Systems per IFO Timing System & Network Output Optics SUS/UK per IFO: RF Osc. ISC ETMx, ETMy (quads) ITMx, ITMy (quads) DETECTION FMx, FMy (triple; folded φ IFO only) PSL SEI BS (triple) CONTROLLERS PD I/F Mix Quad SUS/US per IFO: DETECTION SUS PRM (triple) φ MODE UPPER SUS Local SRM (triple) CONTROLLER MASS Actuator IMC2 (triple) PD I/F Mix OMC (TBD) ISC Global UIM Actuator ACQUISITION IO/IMC φ MODE Cabling from Drivers to 12 ISC Global PM CONTROLLER Vacuum Chamber Feed- Actuator Throughs is SUS/US PD I/F Mix ISC Global Responsibility MODE TM Actuator SWITCHING Cabling from Vacuum ALGORITHM Chamber Feed-Throughs 4 to SUS I/F Connector & 4 12 I/F SUS/UK Bracket is SEI 5 Reflected Responsibility Memory? Digital Coil I/O Drivers (6) SUS/US Packaging & Channels per Module are TBD SUS SUS SUS AI Local Control Coil ADC CPU DAC Filters DeWh Filters Drivers (6) Optical AI UIM Coil Radio Frequency (RF) Filters DeWh Filters Drivers (6) Control/Monitor I/F Audio Frequency (AF) GDS Reflected DAQ Φ = Phase adjuster AI Penultimate Coil Memory? PD = PhotoDiode Filters DeWh Filters Drivers (6) I/F = Interface AI = Anti-Image Filter AI ESD ES AA = Anti-Alias Filter Filters DeWh Filters Drivers DeWh = De-Whitening Filter Wh = Whitening Filter AA Local Control OSEM ES = Electro-Static Filters Wh Filters Sensor I/F UIM = Upper Intermediate Mass Packaging & Channels PM = Penultimate Mass TM = Test Mass per Module are TBD AdLIGO 7 LIGO-G050318-00-C
US-UK Interfaces and responsibilities � Simply stated, the responsibilities for the UK and US are: » UK – OSEMs – OSEM LED drive and PD readback electronics – OSEM Coil Drive electronics – Electro-Static Drive electronics » US – All vacuum cabling and connectors required to propagate signals to/from OSEMs and ESD actuators – All external cable and connectors – Power supplies – All anti-alias, whitening, anti-image, dewhitening, etc to match to ADCs and DACs. 8 AdLIGO LIGO-G050318-00-C
US Responsibilities cont’d » US responsibilities (cont’d) – All ADCs, DACs, BIO required – All computing hardware and software required – All networking hardware and software required – Racks and subracks, TBD depending on location of equipment 9 AdLIGO LIGO-G050318-00-C
US to UK Interfaces � OSEM to Vacuum cable » US to provide all vacuum cable and the required female 9-pin MicroD connector to mate to the OSEM. » OSEM pinout per the ICD � OSEM Satellite Module Output Connector Cable to Vac. Flange » US to provide 25 pin shielded, twisted pair cable and connectors required to mate Satellite amp to vacuum flange. » Pinout and gender of connectors per the ICD 10 AdLIGO LIGO-G050318-00-C
US to UK Interfaces cont’d � OSEM Satellite Amp to OSEM Drive Electronics Cable » US to provide 25 pin, shielded, twisted pair cable required to mate OSEM Drive Electronics Module to Satellite Amp. » Pinout and connector genders per the ICD. � OSEM Drive Electronics to AdL Controls » US to provide 25 pin, shielded, twisted pair cable required to interface the OSEM Drive Electronics Module to US-provided AA, whitening, AI, dewhitening, etc. » Pinout and connector genders per the ICD 11 AdLIGO LIGO-G050318-00-C
US to UK Interfaces cont’d � ESD Actuator to Vacuum Cable » US to provide all internal vacuum cables, feedthroughs and connectors required for ESD. » Cable types, etc. are TBD. Bob Taylor has sample and some quotes from Accu-Glass and Coonar. � ESD Amp to Vacuum Flange » US to provide all coax cables required to connect ESD amp output to vacuum flange � ESD Amp to AdL Controls » US to provide 15 pin, shielded, twisted pair cable required to interface ESD Amp to US-provided AA, whitening, AI, dewhitening, etc. » Pinout and connector genders per the ICD 12 AdLIGO LIGO-G050318-00-C
US to UK Interfaces cont’d � Power Supplies » US to provide all DC power required for UK modules and racks » Power forms and requirements per the ICD 13 AdLIGO LIGO-G050318-00-C
AdL Quad SUS Controls Block Diagram The controls for the L1 and L2 � stages are each roughly equivalent Control BW= 0.1Hz-3Hz M0 to what is presently required for a Input Matrix Output Matrix 6 CH FM 6 CH 6 DOF FM 6 DOF 6 CH FM 6 CH (6x6) (6x6) single LIGO LOS. R0 A simple scaling using the number Input Matrix Output Matrix 6 CH FM 6 CH 6 DOF FM 6 DOF 6 CH FM 6 CH � (6x6) (6x6) of IO, FMs, etc. shows that each quad is approx. equivalent to 4 From ISC Global 3 DOF FM Controls LIGO LOS’s. L1 Output Matrix Present 40M linux CPUs handle 4 Input Matrix + of Filters 4 CH FM 4 CH 3 DOF FM 3 DOF 4 CH FM 4 CH � (4x3) (3x4) 12 FMs optics, so we could implement the Control BW= 3Hz-30Hz From ISC Global system with our existing controls 3 DOF FM Controls L2 architecture, if needed. We could Output Matrix Input Matrix of Filters + 4 CH FM 4 CH 3 DOF FM 3 DOF 4 CH FM 4 CH also use a variation of some of the (4x3) (3x4) 12 FMs PCI-based controls that has been Control BW= 30Hz-300Hz used recently. L3 The increased number of IO points, From ISC Global Output Matrix � 3 DOF FM 3 DOF 5 CH FM 5 CH Controls (3x5) etc. will need to be factored into any AdL CDS design. Total Number of filter modules = 18+18+26+26+8=96 Total ADC inputs = 6+6+4+4=20 Total DAC outputs = 6+6+4+4+5=25 14 AdLIGO LIGO-G050318-00-C
AdL Quad SUS Controls Status Vacuum Cables and connectors � » Prototypes for the vacuum harnesses and cables are being fabricated for use on the quad test stand at CIT. » Additional cables and harnesses will be fab’d for LASTI » AdL SEI is using the same types of cables, connectors and conventions as AdL SUS 15 AdLIGO LIGO-G050318-00-C
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