1

Miscellaneous News

From RALPeter W Phillips

2

Sensirion Adaptor & DCS display

Stable when SCTDAQ not running, occasional DCS crashes when running both under study

3

Sensirion readout also in SCTDAQ

4

Purchased additional PSU for Stave250

TSX1820P-Single channel 18V 20A-GPIB-£791

CPX400DP-Dual channel -Each 20A below 20V-GPIB, USB, LAN-£975

Taken together, we can now service all three Stave250 power segments

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16 Channel (4*4) HVMUX Layout

UKSP2

Some new StuffPeter W Phillips, RAL

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UKSP2

CAM2 CAM4LIV21 LIV12

Power initially through 2mm connectors to facilitate

studies of differingchain combinations

Chain of Modules

8

Special Feature: CAM1 built with one unshielded hybrid

Extra DTN occupancy at specific locations,related to use of non-blind vias.

(Easily avoided in future submissions.)

0.5fC Threshold

9

Preliminary Conclusions• CofM STAR SP works well

– ENC values within range expected due to temperature variation• We understand how to make the reference ties within a module.

– Hollow square is adequate• The shield is probably not required

– more work to do on this• CM develops along the SP chain

– can be removed by adding capacitors to LVDS screen– May or may not be sufficient in a longer chain

• Open Questions– How does “4on” compare with “1on”?– How do wirebonds change things?

10

48.8C

48.0C

49.8C

47.5C

UKSP2, TSX1820P 9.5A 250V, 4 ON, 3PG@1fCChain made by wires, 2280-6

47.5C

44.6C

43.0C

47.5C

11

39.7C

39.2C

40.6C

38.0C

UKSP2, TSX1820P 9.5A 250V, 1 ON, 3PG@1fCdirect connection by wires, composite

39.6C

40.0C

39.1C

39.3C

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9.1C

8.8C

9.2C

9.5C

UKSP2, TSX1820P 9.5A 250V, 4 ON, 3PG@1fCdENC (individual-all), (2280-6 - composite)

7.9C

4.6C

3.9C

8.2C

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49.2C

48.6C

50.3C

47.0C

UKSP2, TSX1820P 9.5A 250V, 4 ON, 3PG@1fCChain made by bonds, 2330-6

47.6C

44.6C

43.1C

47.9C

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-0.4C

-0.6C

-0.5C

-0.5C

UKSP2, TSX1820P 9.5A 250V, 4 ON, 3PG@1fCdENC (wires-bonds), (2280-6 – 2330-6)

-0.1C

0C

-0.1C

-0.4C

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48.2C

47.7C

49.4C

46.0C

UKSP2, TSX1820P 9.5A 250V, 4 ON, 3PG@1fCChain made by wires & bonds, 2333-6

46.8C

43.9C

42.5C

45.7C

DTN0.5fC 0.4fC

Column Individual All (wire) All(bond) All(both) Individual All (wire) All(bond) All(both)

00 10 13 11 9 472 541 429 466

01 15 18 21 13 653 626 585 623

10 2 2 1 2 134 130 150 127

11 18237 18603 18678 18931 28808 29215 29634 29638

20 0 0 0 0 46 43 35 26

21 0 0 0 0 31 16 21 16

30 3 4 2 2 119 151 104 124

31 2 2 2 0 159 201 197 196

40 0 0 0 0 33 51 28 33

41 0 0 0 0 3 6 6 6

50 0 0 1 0 16 18 21 15

51 3 1 0 1 37 34 43 34

60 8 4 10 9 409 481 457 416

61 9 7 11 7 341 371 488 506

70 11 8 26 31 357 436 685 584

71 12 19 43 39 524 579 952 943

composite 2280-11 2332-11 2333-11 composite 2280-12 2332-12 2333-12

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What if I try the new PSU?

CPX400DP-Dual channel -Each 20V 20A or 60V 7A-GPIB, USB, LAN-£975

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48.7C

48.2C

49.8C

48.2C

UKSP2, CPX400DP 9.5A 250V, 4 ON, 3PG@1fCChain made by bonds, 2336-21

47.1C

44.2C

42.7C

47.4C

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0.1C

-0.2C

0C

-0.7C

dENC TSX1820P (wires) – CPX400DP (bonds), 9.5A 250V, 4 ON, 3PG@1fC (2280-6 – 2336-21)

0.4C

0.4C

-0.3C

0.1C

DTNTSX1820P 0.5fC CPX400 TSX1820P 0.4fC CPX400

Column Individual All (wire) All(bond) All(bond) Individual All (wire) All(bond) All(bond)

00 10 13 11 8 472 541 429 451

01 15 18 21 15 653 626 585 566

10 2 2 1 2 134 130 150 137

11 18237 18603 18678 18707 28808 29215 29634 29638

20 0 0 0 0 46 43 35 15

21 0 0 0 1 31 16 21 18

30 3 4 2 1 119 151 104 134

31 2 2 2 2 159 201 197 191

40 0 0 0 2 33 51 28 17

41 0 0 0 1 3 6 6 4

50 0 0 1 0 16 18 21 13

51 3 1 0 3 37 34 43 42

60 8 4 10 8 409 481 457 332

61 9 7 11 7 341 371 488 319

70 11 8 26 8 357 436 685 293

71 12 19 43 15 524 579 952 474

composite 2280-11 2332-11 2336-26 composite 2280-12 2332-12 2336-27

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Summary and Plans

• With the new PSU, it looks just as good with bonds as it did previously with wires– Need to look at the outputs of the two PSU to

understand this• Are the inductors helping?– Remove some to find out

• Is the STAR helping?– Replace one board by Brookhaven “non STAR”

equivalent

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BACKUP

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48.1C

47.4C

49.1C

45.7C

UKSP2, 9.5A 250V, 4 ON, 3PG@2fC2272-11

46.4C

43.4C

42.4C

46.9C

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0

1

2

3

4

5

6

7

DTN: Four modules, single chainColumn 1.0fC 0.75fC 0.5fC 0.4fC 0.3fC

00 0 0 7 448 10032

01 0 0 18 599 12050

10 0 0 2 135 4824

11 202 2932 18505 29384 50386

20 0 0 0 52 1415

21 0 0 0 33 1217

30 0 0 4 134 4434

31 0 0 5 173 5815

40 0 0 11 297 4842

41 0 0 1 99 1895

50 0 0 17 364 6235

51 0 0 35 665 7794

60 0 0 609 7855 58112

61 0 0 640 7720 55345

70 0 2 1785 15317 83469

71 0 1 1770 14537 77866

2272-14

NS

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0

1

2

3

4

5

6

7

DTN: M3 aloneColumn 1.0fC 0.75fC 0.5fC 0.4fC 0.3fC

00

01

10

11

20

21

30

31

40

41

50

51

60 0 0 13 603 11977

61 0 0 4 374 8769

70 0 0 13 327 7370

71 0 0 12 401 8386

2272-25

NS

=> Significant Improvement!

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0

1

2

3

4

5

6

7

DTN: Four modules, two chainsColumn 1.0fC 0.75fC 0.5fC 0.4fC 0.3fC

00 0 0 12 465 10147

01 0 0 18 608 12155

10 0 0 1 115 4973

11 202 2951 18561 29259 50614

20 0 0 2 44 1418

21 0 0 0 34 1166

30 0 0 1 130 4400

31 0 0 4 213 5930

40 0 0 6 196 3896

41 0 0 2 85 1748

50 0 0 18 561 7875

51 0 0 95 1004 10097

60 0 0 20 669 14726

61 0 0 16 505 12420

70 0 0 17 569 10476

71 0 0 26 728 12448

2276-9

NS

=> Improvement Maintained!

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Interpretation & Analysis• M3 is fine when operated on its own

– Suggests the “hollow square” is perfectly adequate for referencing purposes

• M3 is fine when all modules are operating as long as it has its own power supply– Suggests the “hollow square” is perfectly adequate for shielding purposes

• Yet M3 is not fine when operated in the same chain as the others– Suggests that CM is developing along the SP chain

• Quick trials with caps and wires indicated that coupling the shield / referencing square to EoS ground could help– Time to implement this properly

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0

1

2

3

4

5

6

7

DTN: Four modules with CMR capsColumn 1.0fC 0.75fC 0.5fC 0.4fC 0.3fC

00 0 0 24 662 12712

01 0 0 28 713 14279

10 0 0 1 110 4894

11 203 2846 18188 28848 49868

20 0 0 1 48 1353

21 0 0 1 31 1165

30 0 0 4 152 4632

31 0 0 2 207 6127

40 0 0 0 39 1136

41 0 0 0 10 352

50 0 0 0 23 926

51 0 0 1 36 1615

60 0 0 12 433 11012

61 0 0 9 436 10203

70 0 0 42 578 10054

71 0 0 14 642 11284

To EoS GND

2279-1

NS

10mF

10mF

10mF

=> Looks great. Has this affected ENC noise?

Implementation

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48.1C

47.3C

49.1C

45.6C

UKSP2, 9.5A 250V, 4 ON, 3PG@2fC2279-11

46.4C

43.4C

42.2C

46.8C

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Difference between 2279-11 and 2272-11(4on, 9.5A, 250V, with and without CMR caps)