UKSP2 Stavelet

Peter, Ashley, Martin

DAY 2 (22/06/2012)

Problem

Culplrit: crease here?

No connectivity to EoS

Connectivity to EoS

Crease magnified

Temporary (and More Permanent) Solutions

Longer term: Roy is having another bottom layer tape plated today.We shall add a section of this on top of the stave to effect a more permanent repair

Setup

Module is presently independently powered:• enables “reference point” for each module• helps decouple SP effects from those related to the shield configuration

Chain of Modules “STAR” power PCB

0V 2.5V

ENC by 3PG at 1fCGain Offset ENC Output noise

20 105 30.2 636 10.7

21 105 30.1 621 10.4

30 106 33.2 621 10.6

31 106 33.0 632 10.7

Results at 9A CI from Tti TSX 1820P, 200V bias-Result for 9.5A, 200V in progress-Will then run 9A and 9.5A at 250V

DTN @ 0.50fC

YES, REALLY!BEST DTN RESULT FOR A STAVE MODULE EVER!

DTN @ ~0.33fC

Plan

• Add two more modules (and semi permanent repair) next week– Test with independent power– Then chain SP of modules with wires

• Final module the week after that– Test with independent power– Then chain of modules SP with wires– Then chain of modules SP with bonds & tape