Preparation for silicon sensor arrival

1
Preparation for silicon sensor arrival

• sensor delivery schedule aggressive
• expect 130 L2-L5 sensors each in July and August
• sensor lot/batch will likely be in the order of
  50-70
• from 9/2003 until 4/2004 270 L2-L5 sensors each
  month
• first L0/L1 (110 pcs) sensors in October 2003
  (but effectively later)

Frank Lehner U Zurich
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
• Sensor QA part flow v2.0
• detailed part flow for testing
• timing estimates
• Procedures for visual inspection v1.0
• Guidelines for clean room and sensor SH v2.0

3
Sensor arrival - preparation

• Key tests
• initial registration into DB
• checking paperwork from vendor
• inserting vendor info into vendor information
  spreadsheet -gt perl script -gt database
• visual inspection
• follow visual inspection guidelines
• use traveler form during inspection (form
  attached to visual inspection guide line)
• insert visual inspection comments into key test
  spreadsheet
• I-V and C-V
• data go into key test spreadsheet
• all L2-L5 sensor key tests at FNAL
• Technician for DB and visuals Nina Ronzhina
• Physicists for IV CV Md Mao/R.Lipton

4
Sensor arrival preparation

• 10 L2-L5 full strip test (FST) at KSU (35) SB
  (65)
• sensors selected for FST by RD and FL
• FST information goes into full strip test
  spreadsheet -gt perl -gt database
• 5 sensors are subject to long term bias test at
  FNAL (Md. Mao/R. Lipton)
• selection based on visual inspection and I-V
  results from key tests
• initially 10 sensors per batch will be
  mechanically measured on OGP at FNAL
• agreement what to measure thickness, flatness,
  cut tolerances 2x (sides and ends)
• sensors which show chips/cracks at edges have to
  be measured
• not yet an agreement on data format

5
Sensor arrival preparation

• irradiation test at KSU
• 1.5 of the sensors (irradiation on baby
  detector)
• two irradiation steps up to 2.5E13 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 (do we need a higher dose
  for them?)

6
Sensor QA plan
7
Sensor arrival preparation questions

• Questions
• Is Nina trained for visual inspection?
• Is the visual inspection station in Lab A ready?
• When do we have the vendor information and key
  test spreadsheet ready?
• Do we have dry boxes for sensor storage at FNAL?
• Are the programs for the mechanical measurements
  on the OGP written?
• Is the output format defined?

8
L0/L1 PRR preparation

• L0/L1 PRR will be on August 8th, 9 a.m. CT
• documents infos posted on http//www.physik.uniz
  h.ch/lehnerf/dzero/prr/prr_l1.html
• following documents are prepared or have to be
  prepared/finalized
• Note on electrical characterization of L1 sensors
• editor Marcel
• status 1st version exists
• plots and results are there, need only additional
  layout work
• I will finalize it
• Note on irradiation of L1 sensors
• editor Frank
• status 2nd version
• plots and results are there
• however results on strip capacitance are a very
  weak point, went up from 1.1 pF/cm to 1.5 pF/cm
• no reults on coupling capacitor value after
  irradiation
• no results on strip capacitance versus HV after
  irradiation

9
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
• to be included in electrical sensor
  characterization note or separate note ??
• 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
• foil activation double check between FNAL KSU
  within 20

10
L0/L1 PRR preparation

• older note on L2 irradiation document for L2-L5
  PRR from March 6, 2003
• editor Regina Tim
• status unchanged
• do we need an update of this at all?
• other existing notes
• quality assurance document v4.0
• visual inspection guidelines v1.0
• sensor SH document v2.0
• generally in good shape

11
L0/L1 PRR preparation

• all documents released to PRR by July 25 (i.e.
  two weeks in advance)
• everybody, please read and send comments in to
  all notes by latest July 20
• again, the notes are posted on
• http//www.physik.unizh.ch/lehnerf/dzero/prr/prr_
  l1.html