W. W. Hansen Experimental Physics Laboratory STANFORD UNIVERSITY STANFORD, CALIFORNIA Gravity Probe B Relativity Mission

Transcription

1 W. W. Hansen Expeimental Physics Laboatoy SANFORD UNIVERSIY SANFORD, CALIFORNIA Gavity Pobe Relativity Mission SQUID Kit / Readout est Readiness Review GP- P0257 Rev - Febuay 20, 1998 Pepaed by: Ken Hoope Systems Enginee Appoved by: ob Schultz Chief Systems Enginee Appoved by: ay Manage, SQUID Development Appoved by: Geoge Mac Keise Chief Scientist Appoved by: Jim Lockhat SRE IP Leade Appoved by:. alle Quality Assuance K. Hoope- pinted 1/24/2010 1

2 Appoved by: J. uneaue Hadwae Manage K. Hoope- pinted 1/24/2010 2

3 SQUID Kit / Readout est Readiness Review & ime: Decembe 18, 1997, 2:00 to 4:00 PM Location: GP- confeence oom Pupose: o ensue that the test aticle hadwae, test facility, gound suppot pesonnel, and test pocedues ae eady fo testing, data acquisition, eduction, evaluation, and contol. Scope: he SQUID Kit / Readout est Readiness Review (RR) will encompass all SQUID Kit / Readout (RO) flight hadwae. he RO flight hadwae includes the completed SQUID Kits assemblies and thei components, including: the SQUID packages, thei sensos, cables, connectos, backets and mounting hadwae. Agenda: Requiements aceability Status Pocedue Status est Pesonnel Status est Resouces Status est Suppot Softwae Status Review eam: John uneaue ay Geoge Mac Keise Jim Lockhat en alle ob Schultz Ken Hoope Ed Ingaham Hadwae Manage Manage, SQUID Development Chief Scientist SRE IP Leade Quality Assuance Chief Systems Enginee Review Leade ONR (ex officio) Objectives: Confim that in-place test plans and pocedues meet veification equiements and specifications. Confim that sufficient and detailed esouces (of the ight type) ae allocated to the test effot. Examine detailed test pocedues fo completeness and safety duing test opeations. Note who is in chage of the test opeations and test aticle and who is in chage of the facilities. Detemine the citical test pesonnel who ae authoized to pefom test. Confim that test suppot softwae is adequate, petinent, and veified (validated fo intended use). Confim that all intefaces with the test aticle, test equipment, and facilities, especially powe, data, instumentation, etc., ae adequate, safe, and in accodance with the test pocedue. Ensue the custome, witnessing agents, test pesonnel, quality assuance, and suppot pesonnel undestand the objective of the test and the paametes that ae citical fo successful opeation. Confim that the documentation has pope taceability. Confim that test equipment has been appopiately calibated. K. Hoope- pinted 1/24/2010 1

4 Exit Citeia: he following items identify the categoies of items to be checked; the individual checks ae enumeated in the attached checklists: Do the test pocedues veify all applicable equiements? Have test pesonnel eceived taining in test opeations pocedues? Ae esouces available to adequately suppot the planned tests as well as contingencies, including failed hadwae eplacement? Has the test suppot softwae been demonstated to handle test configuation assignments, and data acquisition, eduction, evaluation, contol, and achiving? Attachments: A. Manufactuing Flow Diagams. Requiements Veification Matix C. Document Status Checklist D. est Pesonnel Status Checklist E. est Resouces Checklists and est Suppot Softwae Checklist F. Completion Cetificate K. Hoope- pinted 1/24/2010 2

5 A. SQUID Kit / Readout Manufactuing Flow SQUID Caie Hadwae Flow P0152 SQUID Caie Substate Fabication P0317 SQUID Caie Substate Cleaning P0164 SQUID Die Pe-sceening Pocedue acket and Heate Hadwae Flow P0117 SQUID acket Assembly Pocedue P0120 Heate Assembling, Chip Resisto P0182 Heate Assembly, Chip Resisto P0116 empeatue Senso Assy Pocedue P0102 SQUID Readout Cable Assembly P0110 Output Cable Sub Assembly P0169 hemal Gound Kit P0080 Cyogenic Magnetic Sceening Pocedue P0166 System Integation SQUID Package Hadwae Flow P0161 SQUID Capacito Kit Assembly SC Cable Connection P0380 Fabication Pocedue fo SQUID Feedback ansfomes P0156 Feedback ansfome Veification P0155 Output ansfome Fabication Veification P0153 SQUID Caie Assembly & Pocess Enduance esting P0157 Use of Epoxy Stycast 1266 Pocedue P0158 Lead Gasket Fabication P0159 SQUID Package Assembly K Hoope - pinted 1/24/2010 P0170 Readout Shake est A-1

6 . SQUID Kit / Readout Veification Matix SQUID Kit / Readout Requiements fom System Design and Pefomance Requiements Spec. [003] Section itle ext & Comments Method Veification Plan RE ECD 3.2 Accuacy Lineaity he eadout system meets the following lineaity equiements in the pesence of tapped flux levels as specified in equiement 1.5: High Fequency In the fequency ange Hz the hamonic distotion of each of hamonics 2-6 of sinusoids with amplitude coesponding to the tapped flux levels of section 1.5 shall be less than 1e Low Fequency Fo fequencies less than 1 Hz, the hamonic distotion of each hamonic 2-6 of sinusoids with amplitude up to 80 acsec London moment equivalent shall be less than 1e-4. (D) (A) Peliminay test in P0160 SQUID Package esting and Veification Will be veified duing SRE testing Peliminay test in P0160 SQUID Package esting and Veification Will be veified duing SRE testing SQUID Kit / Readout Requiements fom SIA Specification [PLSE-12 F ] Section itle ext & Comments Method Veification Plan RE ECD SQUID Kit Pime Item Definition Pime Item Diagams SQUID Package Inteface Definition A SQUID kit consists of two SQUID Packages, each containing one SQUID Senso, the cables connecting the above components to the cold end Pobe connectos, and the SQUID backet (poviding the components fo themal contol) and othe mounting hadwae equied to hold the above components in place. hee ae two SQUID kits in the SIA. Functional Intefaces he SQUID kit shall inteface though the pobe cables to the SQUID fowad Electonics fo powe and opeational contol (Section ), fo themal contol (Section ), and to delive Science Signals (Section ). It shall inteface to each Science Gyoscope though its Supeconductive Cable. It shall inteface to the stuctue of the Pobe though the SQUID Mounting acket. I Inspect to dawings (NEG X), and (POS X) 4/98 4/98 K Hoope - pinted 1/24/2010-1

7 Signal Intefaces Electical Intefaces hemal Intefaces Mechanical.2.5 Intefaces Chaacteistics Pefomance Noise at 5.5 millihetz Each SQUID kit shall have the following electical inputs and outputs. 1. acket instumentation inputs and outputs a. Input dive cuents to two GRs. b. Output signal voltages fom two GRs. c. wo SQUID backet heate cuent inputs (one pime & one spae). 2. he following inputs and output to/fom each of the two SQUID packages contained in a SQUID kit fo connection to the SQUID fowad electonics. a. ias cuent input. b. Modulation signal input. c. Feedback signal input. d. Voltage signal output. 3. he following input to each of the two SQUID packages contained in a SQUID kit fo connection to the gyoscope pickup loop. a. Gyoscope pickup loop flux signal. he SQUID hadwae shall inteface to the cold end connectos as shown in LMSC dawing 1C34103 he opeating tempeatue of each SQUID Package shall be maintained as specified in Sections and by an active themal contol system that uses a GR and a heate mounted on each SQUID acket. he Pobe maintains a tempeatue at the mounting as specified in Section he total powe deliveed to the SQUID acket shall not exceed that specified in Each SQUID acket shall inteface to the Pobe Quatz lock Suppot stuctue as shown in LMMS dawing 1C In the specifications below, the convesion fom flux signal in the SQUID input loop to angle equivalent signal assumes a fou tun pickup loop, a 130 Hz spin speed, and a 3 minute oll peiod. he SQUID senso noise shall have a magnitude less than 140 macsec/hz^0.5 equivalent at 5.5 mhz (single-sided). Noise at 130 Hetz he SQUID senso noise shall have a magnitude less than 60 macsec/hz^0.5 at 130 Hz, whee the flux to angle scale facto assumes a otating tapped dipole flux level equal to the London dipole moment at 130 Hz (this tapped flux level is an assumption only, and does not occu in fact). DC Lineaity he V-flux chaacteistic of the SQUID senso shall have a lineaity bette than 1% ove a +/- 100 acsec ange of uncompensated eo. I Inspect to dawings (NEG X), and (POS X) I Inspect to dawings (NEG X), and (POS X) D adas 5/98 I o be veified at payload testing 5/98 I S Inspect to dawings (NEG X), and (POS X) Veification Veification A qualification unti will be tested in Veification D adas 5/98 K Hoope - pinted 1/24/2010-2

8 Hamonic Distotion he hamonic distotion of the SQUID opeating with flux-locked-loop electonics having a distubance ejection in the ange of fo signals as specified in shall be less than 10^-4 SQUID hemal Chaacteistics Veification K Hoope - pinted 1/24/2010-3

9 Opeating empeatue Range SQUID ias empeatue Coefficient SQUID Scale Facto empeatue Coefficient empeatue Stability empeatue Dift Flux Jumps Input Coil Impedance Damping of Cable to Package Joint Feedback ansfome Coupling Electical Isolation Pickup Loop to SQUID Coupling (a) he nominal opeating tempeatue ange is defined in 3.4 of 003, and it is the ange ove which all othe pefomance equiements must be met. (b) he functional opeating tempeatue ange is 2.5 K to 4.2 K, and it is the ange ove which the only equiement is that the SQUID shall be able to be flux locked. he SQUID shall have a bias tempeatue coefficient of less than 0.01 flux quanta/k ove the tempeatue ange 2.7 K - 3K he SQUID shall have an input cuent-to-squid flux tansfe coefficient whose tempeatue coefficient is less than 3.0x10^-4 in the ange 2.7-3K Deleted. Requiement intent moved to.1.16 SQUID acket hemal Chaacteistics. Deleted. Requiement intent moved to.1.16 SQUID acket hemal Chaacteistics. hee shall be no moe than 1 flux jump pe day with an amplitude in the ange of 1 to 20 acsec. hee shall be no flux jumps with an amplitude exceeding 20 acsec. he SQUID senso input coil shall have an inductance less than 2.0 micoheny and shall be stable to 5 pats pe million pe yea. he decay time of the SQUID Package Input cicuit and Cable to package joint shall be less than 1% in 10 min. he SQUID Feedback ansfome shall have mutual inductance of 0.35 micoheny to 0.45 micoheny and shall be stable to 5 pats pe million pe yea. he esistance between any two of the following shall be geate than 20 megaohms: bias, modulation, feedback, and signal. he Pickup Loop shall have a coupling to the SQUID bette than 40 fa/macsec. he coupling shall have as a goal a stability of one pat in 100,000 pe yea. (a) N/A, est duing acceptance testing of (b) SQUID package. Veification A I,A A,S A Veification Veification Analysis: S0295 On-Obit Poton Induced Flux Jump Rate, Veification Inspection of manufactue data - in hadwae folde. Analysis: S0296 Input Coil Feedback ansfome and Input Cicuit Stability Veification Re-veified at payload test Analysis: S0296 Input Coil Feedback ansfome and Input Cicuit Stability Similaity: Qual. unit tested in P0156 Feedback ansfome Veification Veification (Will be e-veified afte integation with pobe.) S0296 Input Coil Feedback ansfome and Input Cicuit Stability. A functional test will be pefomed at Payload level to veify input configuation 6/98 6/98 8/98 5/98 8/98 K Hoope - pinted 1/24/2010-4

10 Input Cicuit Mutual Inductance Stability he mutual inductance of input coil to SQUID loop shall be stable to bette than 5 pats in 1.0e6 pe yea. SQUID ias Cuent he SQUID senso shall have a bias cuent between 20 micoampee and 60 micoampee. Modulation Coil to SQUID Mutual Inductance Input Filte Capacitance SQUID Package AC Magnetic Shielding SQUID acket hemal Chaacteistics Gemanium Resistance hemomete Chaacteistics A S0296 Input Coil Feedback ansfome and Input Cicuit Stability Veification he mutual inductance shall be between 1.3 nh and 1.5 nh. I Inspection of vendo acceptance data package - in hadwae folde he capacitance fom each contact block to gound shall be between 8 nf and 13 nf. he SQUID package shall povide ac shielding such that flux coupling fom an applied extenal magnetic field shall be <= 1.0e-7 fluxquanta/p (flux is efeed to flux in SQUID loop). he applied extenal field is the fee magnetic field applied to the exteio of the SQUID package. he themal design of the SQUID backet (including GRs & heates), SQUID packages, and elated electical cables shall have the capability to meet the equiement in 3.4 of 003. he GRs shall have a nominal esistance of 1500 Ω to 2500 Ω at 4.2 K and be calibated ove the tempeatue ange 2.5 K to 20 K with an accuacy of 5 mk ove the tempeatue ange fom 2.5 K to 10 K. P0161 SQUID Capacito Kit Assembly S A Veification Analysis of themal design to veify capability to meet equiements (stability equies tempeatue contol electonics). S0297 SQUID acket hemal Chaacteistics Inspection of calibation data povided by vendo - in hadwae folde. Heate Resistance he heates shall have a esistance of 1320 ohm +/- 100 ohm at 4.2 K. P0120 Heate Assembling, Chip Resisto Heate Dipole Moment due to Cuent he heates shall have a cuent induced magnetic dipole moment < 2.0e-9 A-m 2 /ma (2.0e-6 emu/ma). hemal Delay ime he time delay fom heat applied to the SQUID backet to the esponse at the GR on the backet shall be less than 1 s. Will be tested in component-level tests fo the Science Mission. Will be tested in GU-2 integated test. Flux Slipping It shall be possible to slip a flux quantum in the SQUID loop with a measuement eo of less than 1 pat in 10^5. I S Similaity to qual unit test 5/98 8/98 6/98 4/99 2/98 A Using design & data fom GU-2 J Lockhat 2/99 Veification. K Hoope - pinted 1/24/2010-5

11 C. SQUID Kit / Readout Requiements Veification Documents Checklist Readout Fabication & Assembly Document Revision Autho itle Witten In Appoval Dwg Flow Database Status Ref Ref P0102 2/1/93 M Luo SQUID Readout Cable Assembly Appoved P0110 ECD 2/5/98 M Luo Output Cable Sub Assembly P0116 ECD 4/30/98 D adas empeatue Senso Assy Pocedue P0117 ECD 3/25/98 SQUID acket Assy Pocedue P0119 ECD 3/11/98 Clip Kit P0120 1/16/98 M Luo Heate Assembling, Chip Resisto Appoved P0152 A 7/15/97 R Shile SQUID Caie Substate Fabication Appoved P0153 A 7/15/97 R Shile SQUID Caie Assembly & Pocess Enduance esting Appoved P /21/95 M Luo Output ansfome Fabication Veification Appoved P /27/95 M Luo Use of Epoxy Stycast 1266 Pocedue Appoved P /13/95 M Luo Lead Gasket Fabication Appoved P0159 8/8/97 M Luo SQUID Package Assembly Appoved P0161 ECD 3/4/98 M Luo SQUID Capacito Kit Assembly Daft P /13/95 System Integation Appoved P0169 ECD 3/11/98 D Hipkins hemal Gound Kit Daft P0182 ECD 4/15/98 D adas Heate Assembly, Chip Resisto Daft P0380 ECD 2/18/98 R Shile Fabication Pocedue fo SQUID Feedback ansfomes Veif Ref Readout est Document Revision Autho itle Witten In Appoval Dwg Flow Veif Database Status Ref Ref Ref P /21/95 R Shile Feedback ansfome Veification Appoved P0160 A 1/8/98 SQUID Package esting and Veification Appoved P /13/95 V Chiang/ M Luo SQUID Die Pe-sceening Pocedue Appoved P0170 1/29/96 Readout Shake est Appoved P0387 A Pickup Loop Resistance Measuement Appoved (SG) K Hoope - pinted 1/24/2010 C-1

12 Additional Documents Document Autho itle Witten In Appoval Dwg Database Status Ref P0057 A 9/29/94 J Lockhat GP- Magnetic Contol Plan - Science Mission Appoved P0059 C 6/19/94 M Keise Pobe C Contamination Contol Plan Appoved P0080 9/5/97 J Lockhat Cyogenic Magnetic Sceening Pocedue Appoved E 10/20/94 alle DRAWING REE, SQUID KI, NEG X, SM Released ECO 1/30/ C 8/3/96 alle DRAWING REE, SQUID KI, POS X, SM Released ECO 1/30/ SQUID KI, NEG X SQUID KI, POS X S0295 ECD 4/30/98 On-Obit Poton Induced Flux Jump Rate S0296 ECD 4/30/98 Input Coil Feedback ansfome and Input Cicuit Stability S0297 ECD 4/30/98 SQUID acket hemal Chaacteistics S0302 ECD 3/20/98 Results of SQUID Qualification ests Flow Ref Veif Ref K Hoope - pinted 1/24/2010 C-2

13 D. SQUID Kit / Readout est Pesonnel Status Checklist est Conductos / Inspectos fo the SQUID Kit / Readout est Facilities Name Received aining in est Opeations ay Dale Gill M Luo R Shile Mage ogan Qualified est Diectos fo SQUID Kit / Readout Name ay Pocedues Requiing Diecto Appoval # itle P0153 A SQUID Caie Assembly & Pocess Enduance esting Veification P0170 Readout Shake est K Hoope - pinted 1/24/2010 D-1

14 E. SQUID Kit / Readout est Resouces Checklists Instuments equiing standad calibation Item Desciption Seq.# ID / Seial # Next Cal. Available HP 4277A LCZ mete with 16047A test fixtue /9/99 1 Keithley 580 Mico-ohmmete /98 1 HP 54601A Oscilloscope A /7/98 SR 345 Function Geneato /4/99 I model CCS Cuent Souce /22/98 HP8620C Oscillato A /7/98 Fluke 77 Hand Mete /98 Quantum Design 5000 electonics /1/98 9 SR 560 peamplifie /22/98 Netwok Analyze SR /5/99 Keithley 196 Multimete /7/98 Instuments equiing non-standad calibation Item Desciption Seq.# ID / Seial # Next Cal. Available Rev SQUID electonics /1/98 Stawbey ee Data Acquisition System Facilities SQUID Acceptance Pobe SQUID Acceptance Dewa Clean Room 130, 132 Readout Clean Aea Readout EMI Sceen Room Readout Geneal Assembly Aea est Suppot Softwae Softwae Poduct Envionment Vesion Contolled Stawbey ee WORKENCH PC DOS V2.1.0 N/A log1.wbw WORKENCH - log1.smpump.wbw WORKENCH - Matlab Windows c.1 N/A bkcunch.m Matlab -

15 SQUID Kit / Readout RR Action Items # Action Assignee ECD Status as of 2/27/98 1 Have pocedues P0317, P0157, P0160 and P0080 & 1/9/98 done appoved J Lockhat 2 Povide ECD dates fo pocedues & additional doc s 1/9/98 done not yet appoved 4 PC fo all poposed spec. changes & coesponding K Hoope Jan. PC done change to Science Gyo Assembly to include deflux heates 5 Rewod & modify veification of SIA qmt. & Jan. PC done &.1.4 J Lockhat 6 Include pickup loop to SQUID coupling functional test D Pickett done 7 Review SQUID bias citical cuent qmt. J Lockhat & Jan. PC done 8 Review modulato coil to SQUID mutual inductance veification data geneated by Quantum Design acceptance eview 9 QA & SE to define how to captue veification data QA ( alle) & SE ( acceptance eview Schultz/K Hoope) 10 Release SQUID Kit dawing tee acceptance eview