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Preparation for L2-5 silicon sensor arrival and L0/L1 PRR

Preparation for L2-5 silicon sensor arrival and L0/L1 PRR. desperately expecting the first 130 L2-L5 sensors from HPK in July - probably coming in two batches only not yet arrived …. Frank Lehner U Zurich Run IIb meeting 7/24/03. Silicon sensor arrival - preparation.

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Preparation for L2-5 silicon sensor arrival and L0/L1 PRR

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  1. Preparation for L2-5 silicon sensor arrival and L0/L1 PRR • desperately expecting the first 130 L2-L5 sensors from HPK in July - probably coming in two batches only • not yet arrived … Frank Lehner U Zurich Run IIb meeting 7/24/03

  2. Silicon sensor arrival - preparation • we have a detailed QA plan with established procedures • All people involved in that business should check on http://www.physik.unizh.ch/~lehnerf/dzero/qa/qa.html • QA document v4.0 • definition of tests • general procedures for testing • note that depletion voltage determination has changed and we adopt the HPK criterion • depletion voltage equals lowest voltage point where increase of 1/C2 versus bias is smaller than 2% • do not need interpolations - 10 V granularity is fine • Sensor QA part flow v2.0 • detailed part flow for testing • timing estimates • Procedures for sensor visual inspection v1.1 • Guidelines for clean room and sensor S&H v2.0

  3. Sensor arrival - preparation • testing sites have started to setup www accessible directories for excel spreadsheets • FNAL: http://d0server1.fnal.gov/users/lipton/www/asptest/sensor_test.html • KSU: http://www.phys.ksu.edu/hep/dzero/Testing • SB: http://sbhepnt.physics.sunysb.edu/silicon/ • UR: tbd • spreadsheets will be copied (raw) into database • only summary info on a special sheet will be transferred into ORACLE tables (via perl scripts) • spreadsheet templates exist on http://www.physik.unizh.ch/~lehnerf/dzero/db/db.html and http://www.phys.ksu.edu/~evt/D0database

  4. Sensor arrival - preparation • following spreadsheet exists now (see E.v.T. talk): • sensor_manufacturerinfo (for FNAL) • sensor_keytest (for FNAL L2-L5 and UR L0/L1) • sensor_fullstriptest (for SB, UR, KSU) • sensor_irradiation (for KSU) • sensor_mechanical (for FNAL, specific data format) • sensor_finalgrade (for Zurich, UR) • templates on http://www.physik.unizh.ch/~lehnerf/dzero/db/db.html and http://www.phys.ksu.edu/~evt/D0database • please use these formats: • use consistent units: pF, nA, MOhm, V, pA/V • charts are optional and up to the testing site • use consistent file naming containing sensor type and number, location, date and spreadsheet type • comment if necessary asap

  5. Sensor arrival - preparation • Key tests: • initial registration into DB (Nina R.) • checking paperwork/floppy disk from vendor for completeness • use of old-fashioned log book for sensor arrivals • checking if accompanying test structure has been shipped • inserting vendor info into “sensor_manufacturerinfo” spreadsheet • visual inspection (Nina R.) • visual inspection station in Lab A set up • I will train her the next days • follow visual inspection guidelines • use traveler form during inspection (form attached to visual inspection guide line) • insert main visual inspection comment into “sensor_manufacturerinfo” spreadsheet

  6. Visual Inspection Traveler • traveler is supposed to guide technician through the visual inspection steps • only major comments will be entered in sensor_manufacturer-info spreadsheet • estimate time for visual inspection: 20 minutes

  7. Sensor arrival - preparation • Key tests cont’d: • IV and CV for all sensors • FNAL: L2-L5 (Md. Mao, R. Lipton) • UR: L0, L1 (R. Demina, S. Korjenevski) • FNAL: 5% per batch I-stabil test for 24h • select sensors with suspicious I-V curves & flaws from visual inspection • enter data or work on program to transfer data into sensor_keytest spreadsheet

  8. Sensor arrival – preparation • 10% L2-L5 full strip test (FST) at KSU (35%) & SB (65%) • FST information goes into “fullstriptest” spreadsheet • summary sheet contains averages • for averaging leave out bad channels • charts in spreadsheet optional • initially 10% sensors per batch will be mechanically measured on OGP at FNAL • measure: thickness, flatness, cut tolerances 2x (sides and ends) • operator: Gordie G. – program on OGP ready • sensors which show chips/cracks at edges during visual inspection have to be measured • Jim provided mechanical data format containing target values and mech. grading

  9. Sensor arrival – preparation • irradiation test and IV & CV characterization at KSU • 1.5% of the sensors (irradiation on baby detector and/or test diodes) • two irradiation steps up to 2.5·E13 10 MeV p/cm2 • irradiate roughly half of the baby detectors which are at KSU anyway for FST tests • L0 & L1 baby detectors have to be shipped from UR to KSU for irradiation

  10. Sensor QA plan

  11. Sensor arrival – preparation issues • grading: • in the beginning done by FL/RD • filled in sensor_finalgrade spreadsheet • will wait with this to get a more complete picture of first batches • www access @ FNAL • have to setup a d0server1 www-directory for access to spreadsheets/data for manufacturer_info, key-tests and mechanical results: Ron’s www-directory ? • sensor storage @ FNAL • all incoming L2-L5 sensors will be stored during key tests in Lab A • dry boxes for sensor storage ordered • after the key tests the sensors, which will not leave FNAL, will be stored in Lab C • sensor shipping • read S&H guideline • do not ship more than 5 sensors per shipment

  12. L0/L1 PRR preparation • L0/L1 PRR will be on August 8th, 9 a.m. CT • documents & infos posted on http://www.physik.unizh.ch/~lehnerf/dzero/prr/prr_l1.html • following documents are prepared and are more or less finalized • Note on electrical characterization of L1 sensors • editors: Marcel & Frank • status: 2nd version exists • plots and results complete • waiting for feedback • should we include results from 3 new L1 sensors? • Note on irradiation of L1 sensors • editor: Frank • status: version 2.5 • plots and results complete • results on strip capacitance are a somewhat weaker point, went up from 1.1 pF/cm to almost 1.5 pF/cm • results on strip capacitance versus HV after irradiation thanks to Md. Mao

  13. L0/L1 PRR preparation • Note on comparison of strip measurements between SB and KSU • editor: Bob • status: 2nd version exists (from July) • gives a very nice overview, shows the overall good agreement between KSU and SB on many measurements with some exceptions though • wait for results on four sensor comparison • Note on fluence determination and dosimetry checks at KSU irradiation facility • editor: Tim • status: 2nd version exists (from July) • contains leakage current vs. fluence plots which are also in the other note • have different values for alpha (10 MeV p) due to different data sets • Tim: 7.9E-17 A/cm using L1-11/12, L2-59/62 • Frank: 11.6E-17 A/cm using L1-11/12, L2-59/62 and testdiodes • foil activation double check between FNAL & KSU within ~20%

  14. L0/L1 PRR preparation • older note on L2 irradiation document for L2-L5 PRR from March 6, 2003 • editor: Regina & Tim • status: updated by Tim last week • changed all relevant fluence numbers in plots from 1 MeV eq. n to 10 MeV p • alpha for 10 MeV for L2-59/62 is low: 6.8E-17 A/cm • other existing notes: • quality assurance document v4.0 -> will do some smaller typo corrections • visual inspection guidelines v1.1 • sensor S&H document v2.0 • generally in good shape …

  15. L0/L1 PRR preparation • all documents released to PRR committee by latest mid of next week • everybody, please read and send comments in to all notes • again, all notes are posted on: • http://www.physik.unizh.ch/~lehnerf/dzero/prr/prr_l1.html

  16. L0/L1 PRR preparation • first suggestions how to organize the PRR session (expect 3h in total): • 20+5’ talks on • general project overview • response to L2-L5 PRR findings/comments • presentation of general sensor QA program • sensor characterization of L1 sensors • probing comparison between FNAL/KSU/SB • irradiation results on L1 & test diodes • flux normalization cross checks • need video link to SLAC, UR, SB, KSU, Zurich

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