Stavelet Update

PWP18/03/2011

2

The Stavelet

Hybrid 0 1 2 3 4 5 6 7

BCC 62 61 60 59 58 57 56 55

MUX 7 6 5 4 3 2 1 0

DEMUX 14/15 12/13 10/11 8/9 6/7 4/5 2/3 0/1

Coupling DC AC AC DC AC DC AC DC

Module 0 1 2 4

s/n 1 9 3 4

Stavelet Numerology

G&S Improvements

Screened HV Pairs

Screened LV Pairs

Tape to FrameTape to Stavelet Core

Litz between EoS and Shield grounds

Chokes fitted toControl Ribbons

Aluminium baseplateunder Stavelet Frame

SHIELD STARPOINT

EoSSTARPOINT

Aluminium cover connected to baseplate with Cu Tape

External HV Filter

Implemented within diecast box(PCB made for future examples)

External LV Filter

220nF10uF

220nF10uF

SP+

SP-

FROMPSU

Screened LV cable to Stavelet(screen is connected to shield)

SP+

SP-

Jan Stastny’s Current Source:Current Noise, Stavelet running at 5A

Before G&S Improvements,without Internal Filter

After G&S Improvements& with Internal Filter

ISP

ABCN COMMANDCOM

DATA

Jan Stastny Current Source at 5A, 230V bias, ALL MODULES ON

25th Feb 2011

Jan Stastny Current Source at 5A, 230V bias, ODDS AND EVENS

3rd Mar 2011COMPOSITE

Col 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

25/2ALL

671 622 632 678 646 624 621 652 657 633 627 651 670 651 619 649

25/2PART

666 620 623 665 683 627 617 633 657 622 614 637 662 638 609 641

diff -5 -2 -9 -13 +37 +3 -4 -19 0 -11 -13 -14 -8 -13 -10 -8

3/3ALL

672 623 634 678 649 627 622 652 655 633 620 643 668 646 614 642

3/3PART

675 613 625 674 658 609 617 648 635 606 611 639 644 622 609 659

diff +3 -10 -9 -4 +9 -18 -5 -3 -20 -27 -9 -4 -24 -24 -5 +16

ENC Differences

WORK IN PROGRESS

Double Trigger Noise

Diff Probe between hybrid SP+ & SP-

HYBRID 0, BWL ON HYBRID 1, BWL ON

JS CS @ 5A, HV 230V, Two L1A seperated by 134 BCO, Scope in AVERAGING MODE

COM

DATA

dV

Diff Probe between hybrid SP+ & SP-

HYBRID 6, BWL ON HYBRID 7, BWL ON

JS CS @ 5A, HV 230V, Two L1A separated by 134 BCO, Scope in AVERAGING MODE

COM

DATA

dV

150nS = 6 BCOThis matches the gap between bands in the double trigger noise occupancy plot

dV vs Hybrid Number

0 1 2 3 4 5 6 7 80

2

4

6

8

10

12

14

dV

dV

Hybrid

SP- SP+

dV (mV) Hybrids with grossDouble L1A Occupancy

Hybrids without grossDouble L1A Occupancy

Double Trigger Noise OccupancySingle Module, ~0.5fC threshold

• Need AC HV connection to second hybrid?