STF B.L.C. #4 second Vertical Test Summary

Period : 2006/09/05~09/08Contents :

▪ Q0-Eacc curve @ 2K&4K ▪ Q0&Eacc time profile @ 2K&4K ▪ Summary of RF Conditioning ▪ Experimental Log ▪ Sensor data @ 2K&4K ▪ After the Vertical Test… ▪ About Inspection of Cavity Inside

▪ Summary

2006/09/15 Kirk

Q0-Eacc Curve @ 2K for this measurement

π mode only !

14.1MV/m

Q0-Eacc Curve @ 2K&4K for all measurements

7.0MV/m

17.1MV/m

16.3MV/m

π mode only !

6.8MV/m

14.1MV/m

Q0&Eacc time profile @ 4K

Q0&Eacc time profile @ 2K

π

8π/9 7π/9π 6π/9

5π/94π/9

π 4π/9

3π/9

8π/9

Q0&Eacc time profile @ 2K

π

8π/9

7π/9π

6π/9

5π/9

4π/9

3π/9

π

Summary of RF Conditioning

date Temp. [K] Total time [h:m] π mode only [h:m] Max. Eacc [MV/m]

9/5 2 4:03 2:00 14.1

9/6 2 4:17 1:50 14.0

9/7 2 4:02 1:00 14.1

9/8 4 0:35 0:35 6.8

9/8 2 5:05 5:05 14.0

~10:00 (π mode only) @2K

Experimental Log @ 2006/09/04

9/0416:40 Cavity installation into the cryostat17:00~ Vacuum evacuation for the cryostat17:17 Dewar valve open

Cool down start21:05 Cavity temp. 3.9K

Experimental Log @ 2006/09/059/05

10:40 1000ℓ dewar exchange11:10 Pass-band measurement12:20 cable correction14:27 calibration for RF diode :30 standard data take @ 4.2K (over-coupled)

f0=1299.628387[MHz], τ=28.8[msec] :34 standard data take @ 4.2K (under-coupled)

f0=1299.628396[MHz], τ=29.6[msec] :41 decompression start15:10 We found that the helium pressure data had been mistaken.18:00 decompression finish

Rs=14.26[nΩ] :08 2K Run start :21 electron detected @ 8.1[MV/m] :32 X-ray emission start @ 11.0[MV/m] :44 Quench @ 14.0[MV/m] ⇒ self-pulse mode :47 Quench @ 14.1[MV/m] ⇒ self-pulse mode19:03 Quench @ 14.1[MV/m] ⇒ self-pulse mode :32 Mode change (π⇒8π/9 mode, f0=1298.8097[MHz]) :48 Quench @ 16.0[MV/m] ⇒ self-pulse mode20:22 Mode change (8π/9 π⇒ mode, f0=1299.625826[MHz]) :26 Quench @ 14.1[MV/m] :28 self-pulse mode21:01 Mode change (π⇒4π/9 mode, f0=1283.780077[MHz]) :11 Quench @ 9.1[MV/m] :13 Quench @ 9.9[MV/m]

Experimental Log @ 2006/09/05 (cont.)9/05

21:44 Mode change (4π/9⇒3π/9 mode, f0=1279.3863[MHz]) :52 Quench @ 10.1[MV/m] :56 Quench @ 12.1[MV/m] :58 Quench @ 12.4[MV/m] ⇒ self-pulse mode22:11 Test was finished

Experimental Log @ 2006/09/069/06

9:43 He transfer start10:52 He transfer stop11:08 decompression start16:45 RF Amp. On

Set the concrete shielding17:00 2K Run start :43 Quench @ 13.0[MV/m]18:50 Mode change (π⇒4π/9 mode, f0=1283.780077[MHz])

self-pulse mode19:13 Mode change (4π/9⇒7π/9 mode, f0=1296.4077[MHz]) :32 Quench @ 14.1[MV/m] :36 Quench @ 15.2[MV/m]20:36 Mode change (7π/9⇒6π/9 mode, f0=1292.7807[MHz]) :46 Quench @ 14.3[MV/m] :48 electron detected

self-pulse mode :58 Mode change (6π/9⇒5π/9 mode, f0=1288.3891[MHz])21:00 electron detected :02 Quench @ 12.1[MV/m] :03 Quench @ 12.8[MV/m]

self-pulse mode :17 Mode change (5π/9⇒8π/9 mode, f0=1298.8094[MHz])

self-pulse modeTest was finished

Experimental Log @ 2006/09/079/07

9:35 Dewar exchanged10:30 He transfer start12:00 decompression start15:10 decompression stop :20 RF On

2K Run start :42 Quench @ 14.0[MV/m] ⇒ self-pulse mode16:00 Mode change (π⇒8π/9 mode, f0=1298.8094[MHz]) :04 Quench @ 16.6[MV/m] ⇒ self-pulse mode :21 Mode change (8π/9⇒7π/9 mode, f0=1296.4077[MHz]) :27 Quench @ 15.2[MV/m] ⇒ self-pulse mode :50 Mode change (7π/9⇒6π/9 mode, f0=1292.7807[MHz]) :53 Quench @ 14.6[MV/m] ⇒ self-pulse mode17:17 Mode change (6π/9⇒5π/9 mode, f0=1288.3891[MHz]) :20 Quench @ 12.6[MV/m] ⇒ self-pulse mode :48 Mode change (5π/9⇒4π/9 mode, f0=1283.780[MHz]) :50 Quench @ 7.5[MV/m] ⇒ self-pulse mode :52 Quench @ 9.9[MV/m] ⇒ self-pulse mode18:29 Mode change (4π/9⇒3π/9 mode, f0=1279.3861[MHz]) :31 Quench @ 12.4[MV/m] ⇒ self-pulse mode :59 Mode change (3π/9 π⇒ mode, f0=1299.6258[MHz])

Quench @ 14.0[MV/m] ⇒ self-pulse mode19:28 Test was finished

Experimental Log @ 2006/09/089/08

9:25 He transfer start10:18 He transfer stop :30 RF On :50 4K Run start11:03 Quench @ 6.1[MV/m] :10 Quench @ 6.8[MV/m] :17 Quench @ 6.8[MV/m]

RF Offdecompression start

14:35 decompression stop15:09 2K Run start :31 Quench @ 14.0[MV/m]

self-pulse mode20:14 Test was finished

Experimental Log @ 2006/09/099/09

9:35 Warm-up start12:52 Warm-up finish

Epk per cell

cell π 8π/9 7π/9 6π/9 5π/9 4π/9 3π/9

1 & 9 14.1 16.5 15.2 14.7 12.8 9.9 12.4

2 & 8 14.1 14.7 8.0 0. 8.7 13.0 24.8

3 & 7 14.1 10.9 3.0 14.7 15.0 4.7 12.4

4 & 6 14.1 6.1 11.7 14.7 2.5 14.4 12.4

5 14.1 0. 16.3 0. 15.9 0. 24.8

unit : [MV/m]

Sensor Position in this measurement

Cell #4

HOM #1

tip

weld

Heating Spot @4K detected by Carbon ResistorAround cells

Cell #1 had the heating spot at 4K.

Heating Spot @2K detected by Carbon ResistorAround cells

π

8π/9

7π/9 π

6π/9

5π/9

4π/9

3π/9

Heating Spot @2K detected by Carbon ResistorAround #4 cell

π

8π/9

7π/9 π

6π/9

5π/9

4π/9

3π/9

Cell #4

APD45mm

Heating Spot @2K detected by Carbon ResistorAround cells

π π