1. Graham Beck, QMUL, WP4 RAL 2 May 2013
Stave QA (2013 kick-off)
“QA scheme will be developed, in collaboration with international colleagues. Who/Where? LBL (Carl H), BNL (Dave Lynn)? Anywhere else (KEK!?) Not (directly) Petals ?
Specify appropriate stave life-cycle handling and QA procedures including:
handling and storage of raw materials (pre-preg, glue);
assembly sequences (curing, annealing);
procedures associated with ensuring assembled products meet specification
and stave transportation. (…presumably this means spec’ing safe transportation?)
Includes:
Specify the detailed thermo-mechanical and electrical test protocols
Coordinate development of suitable test systems:
- define test outputs, data formats etc, as required for the construction database.
Where does QA happen? (Presumably refers to “where … within the UK?”)
Mechanical: Stave manufacturing sites (Liverpool & Oxford).
Thermal QA: QMUL
Electrical QA: RAL
Graham Beck, QMUL, WP4 RAL 2 May 2013

2. Items: Materials, Components, Assemblies.
For (at least) my own benefit, a list of things to consider helps to focus on the scope of QA ~ ~ ~
Items: Materials, Components, Assemblies.
Properties: Mechanical, Thermal, Electrical …
Procedures: Handling, Machining, Glueing, Inspecting, Testing, Transporting
Stresses: Mechanical, Electrical, Thermal, … Radiation damage, Moisture, Creep, Pneumatic, Magnetic, Chemical, … Asteroid Impact (perhaps not?).
… “Static” e.g. gravity, HV stress, ….
… Dynamic e.g. Vibration, e/m interference, thermal shock, ESD ….
Should add to this (exploratory) list & look for problem areas!
Draw up a list of concerns that motivate QA …
Look back at “old” SCT for “lessons learned”.
Discuss Necessary vs Wasteful QA (i.e. “prioritise”)
Graham Beck, QMUL, WP4 RAL 2 May 2013

3. Graham Beck, QMUL, WP4 RAL 2 May 2013
More down to earth:
Start by documenting the established QA issues (and communicate with “Performance Requirements” authors, re limits). . . in some structured way:
Examples
ITEM ISSUE DESCRIPTION LIMITS
Completed Core Thermal Performance (Static) DT measurements… + - xxx
Completed Core Thermal Shock Transient Response…
Stave (Completed) Electrical Performance* Basic Connectivity,
HV switching, Read-out
Noise Performance
* this is potentially a very large and important chunk of QA. Presumably it IS part of “Stave QA”???
How should we get started on this?
Graham Beck, QMUL, WP4 RAL 2 May 2013

4. Graham Beck, QMUL, WP4 RAL 2 May 2013
ACTION
I will contact the other task leaders and international collaborators (when I know who these are) to start the process of specifying QA.
(Obviously) QA will evolve continuously, with time and experience.
Associated Milestones and Deliverables are stated as:
M4.1 “TM and Electrical performance requirements” Draft/Final: Q / Q AbIC
M4.3 “Stave assembly and QA procedures” Draft/Final: Q1 2014/ Q AbIC
Two more slides – a couple of comments + a more serious issue ….
Graham Beck, QMUL, WP4 RAL 2 May 2013

5. Graham Beck, QMUL, WP4 RAL 2 May 2013
“Write it down, and Save a bit for later” ….
<100> Lorentz Angle – we don’t understand it, but we do know how to locate the sensors, what their original depletion voltages were etc. - from the database.
Back-plane contact resistance (where did that come from?). I still have Martin’s bead samples (I hope, in spite of preparing to move labs….)
I still have some tpg samples (K measures the same after 13 years). Try not to lose them!!
Graham Beck, QMUL, WP4 RAL 2 May 2013

6. Graham Beck, QMUL, WP4 RAL 2 May 2013
Database
QA will (obviously) generate data to be stored in a structured, accessible, form.
From WP3/5 kick-off meeting Monday (DaveR): Module/Hybrid DB exists, is in use, and will be extended to cope with Sensors and (probably) End-Cap.
As of NOW, we do not have sufficient effort to construct a Stave DataBase. (Mech, Elec…).
Issues include:
- Separate or Part of the Module/Hybrid DB ? (Note DaveR is heavily occupied elsewhere).
- Location (of server and effort)?
- Software effort: This is a big job. QMUL have lost A.J.Martin. Alex Owen can contribute (at most) 10% of his time (and has limited DB expertise).
Graham Beck, QMUL, WP4 RAL 2 May 2013