FDC Readiness Checklist

Forward Drift Chamber Assembly Readiness Review Checklist

The goal of the Forward Drift Chamber Readiness Review is to assess whether Jefferson Lab is ready to begin production of the Hall D Forward Drift Chamber. Specifically the following questions need to be examined:

1. Environment
   1. General
      • Are the MSDS information sheets available for all products used during production?
      • What support do you get from Jlab EH&S services?
   2. Clean Room
2. Procedures:
   1. Are all procedures for handling and production of cathode planes in place?
   2. Are all procedures for handling and production of wire planes in place?
   3. Guidance should be given for each of the steps in the fabrication procedure for ease of estimating completion times.
3. Training:
   1. What are the training procedures for first-time workers in each of the areas where they will work?
   2. How is this documented?
4. Acceptance Testing
   1. Cathode foils
   2. Cathode frames
   3. Wire frame
      • What kind of measurements, and what frequency is planned during assembly?
      • What documentation is recorded at each stage?
5. Recovery Procedures
   1. What are the procedures for reporting an anomally in measurements?
   2. What are the procedures for rectifying any problems encountered during assembly? Is this documented?
6. Acceptance Testing of completed module
   1. How are the dimensions checked and verified against drawings?
   2. What testing will be done to verify performance?
   3. How will the chamber be tested with cosmics?
7. Tracking
   1. Are all travelers specified for the project?
   2. What information is recorded for each wire plane?
   3. What information is recorded for each cathode plane?
   4. What information is recorded during assembly fabrication?
8. Schedule
   1. How is the schedule tracked?
9. Reporting
   1. Is the reporting chain to the project clear?

Testing and Tracking

This Quality Assurance and Acceptance Test Plan must include the following:

1. A Component Inspection Plan, comprised of:
   • Inspection of all materials received from the vendor’s suppliers and subcontractors and the recording of this information.
   • Obtaining and recording of all material certifications and analyses.
   • The calibration and identification of standards and instrumentation used for testing; the intervals between calibrations are also to be defined.
   • Establishment of inspection points for the incoming components, which will measure critical parameters.
   • The recording of all inspection data in such a manner so that the history of a component can be readily traced.
2. A Process Quality Plan, comprised of:
   • Step-by-step process documents, with instructions and prints pertaining to each assembly and/or manufacturing step.
   • Safety information for the job operator, including material data safety sheets
   • A method of reporting any mechanical defects found during assembly of components.
   • A mechanism for recording all job operator work sessions.
3. Final Acceptance Test Plan, comprised of:
   • Acceptance of the wire planes.
   • Acceptance of the cathode planes.
   • Acceptance of the electrical functionality of wires and strips.
   • Acceptance of the readout channels at the level of the preamplifier output.

Tracking

The FDC production group must keep a record (travelers) of all raw materials and inspections that are used in the construction of each module, and document the procedures followed during fabrication.