WP3 10 July 2014 QMUL/GAB 1

Status of Sensor Testing Setup at QMULRe-structuring of QMUL Physics & Astronomy

June/July 2013: Evacuated Physics building and clean room: dis-assembled probing system & moved everything to new clean room. June 2013 – April 2014. Clean room air handling fiasco. Apparently fixed now.

3rdJuly: AJB+GAB started re-assembling probe station.

Knock-on effects from building works continue: (building under wraps, camping out, interruptions to services ). Scheduled to re-inhabit offices mid-September.

[My personal reaction to this extensive disruption is quite simply unprintable]

WP3 10 July 2014 QMUL/GAB 2

Recently (3rd/4th July)

• Refurbished cable feedthrough box (seals perished).

• Unclamped stages, re-attached microscope, camera,

vacuum, prober control box.

• Booted ** Windows2000 ** PC + NUCLEUS prober

sofware

• => Checked stage motion still working (in general).

Needed, to regain July 2013 status :

• Run Labview (CAV 2013 vn): Check chuck motion –

wafer alignment procedure and strip probe pattern.

• Check chuck planarity (uniform needle scrub)

• Re-cable GPIB to instruments

• Re-install blind on cabinet (Jag)

• (maybe replace video camera. Service Nitrogen

generator.… )

WP3 10 July 2014 QMUL/GAB 3

Further ahead:

- Bart’s scheme to speed up probing using probe card / switch matrix.

- Need new RA + training (GAB thinly spread and ageing).

Further work required in order to scan ATLAS Sensors:

• Install CAV/QMUL chuck adapter (for ATLAS sensors. Currently at CAV).

• Bias and Signal Cables: make/install. (+ Patch panels if necessary)

• (trivially) incorporate UPS

• Make new bias stand-off box (1000V) for Wayne-Kerr LCR meter. (+ install

protection unit).

• Check functionality of instruments & strip-checker measurements

At this point we would need an expendable ATLAS sensor to verify / compare results.

WP3 10 July 2014 QMUL/GAB 4

Not related to Sensor testing, but need to flag somewherePreliminary Thermal simulation of convection in the barrel (Liverpool WP6, 9th July)… indicates may be large thermal gradients, dependent on cooling path of DCDC converter.

Need a thermal description to understand this better.