From toru.tsuboyama@kek.jp Tue Aug 22 08:37:11 2000 Date: Mon, 21 Aug 2000 21:08:35 +0900 From: Toru Tsuboyama Subject: Summary of SVD14 monitors Dear SVD monitor lovers, SVD 1.4 has been completed and now it is being installed to Belle. Most monitor system have been installed and tested as follows, =================================================================== For the radiation-monitor hybrids, in the first test, there seemed to be a lot of bad RADFETs. We found later that the 0.635-mm-pitch cable was too thin for the 1.27 mm pitch standard connectors. After the cable wires were soldered to the connector, all connections were established. No new bad channels have appeared after the hybrids were assembled in B4. The last measured data are listed as follows, Position ID K1 K2 R1 R2 RTD1 RTD2 PIN1 PIN2 Bad RADFET (V) (V) (V) (V) (Ohm) (Ohm) (V) (V) Channels ------------------------------------------------------- F-SVD- 0 07 6.28 5.92 1.15 -1.0 120.0 120.8 0.05 0.2 R2(???) F-SVD- 90 03 6.3 6.3 1.9 2.2 119.7 120.7 0.05 0.2 F-SVD-180 10 6.3 6.24 1.6 1.3 119.7 120.7 0.05 0.2 F-SVD-270 04 -8.3 6.13 1.44 -12. 120.0 120.9 0.05 0.2 K1 R2 B-SVD- 0 09 6.32 6.26 1.24 1.18 120.0 120.8 0.05 0.2 B-SVD- 90 05 6.28 6.27 1.55 1.66 120.1 120.8 0.05 0.3 B-SVD-180 08 6.28 6.28 1.57 1.36 119.9 120.8 0.05 0.2 B-SVD-270 06 6.28 6.37 1.36 1.63 120.0 120.9 0.05 0.4 F-BP- 0 17 6.25 10.0 1.55 1.59 120.4 121.1 0.05 0.2 K2 F-BP- 90 11 6.40 6.33 1.67 1.61 120.3 121.1 0.05 0.2 F-BP-180 13 6.3 6.2 1.4 1.4 120.2 121.0 0.05 0.2 F-BP-270 15 6.29 6.34 1.39 1.56 120.2 121.0 0.05 0.2 B-BP- 0 18 6.25 6.12 1.3 10.7 120.1 120.9 0.05 0.2 R2 B-BP- 90 12 6.33 6.30 10.8 1.54 120.1 121.0 0.05 0.2 R1 B-BP-180 14 6.26 6.33 1.45 1.69 120.3 121.1 0.05 0.2 B-BP-270 16 6.36 6.29 10.8 1.47 120.2 121.0 0.05 0.2 R1 Here, K1/K2/R1/R2 corresponds to K and R range RADFET thoreshold voltages, measured with the RADFET readout module by Wollongong Univ. About 6.2 V for the K range and 1.5 V for R range are standard. We found two K channels and four R channels are now useless. They have been known in the check after the wire bonding was done by Tajima. This implies that no new bad channel happened after they were assembled. Thanks to the redundancy of the RAFET chip (20 good chips were selected and shipped to KEK by Varner), at least one K and one R data is available from each hybrid. Since the space inside the inner cover is tight, the real positions of -SVD- sensors in phi are 20, 110, 200 and 290 degrees. RTD1 and RTD2 are resistance (Ohm) of RTDs for operational amplifiers (2-wire readout) and hybrid (4-wire readout). They are 100 Ohm + cable resistance. PIN1 and PIN2 are noise level (V) of the low-gain and high-gain PIN-diode amplifier outputs. The noise should be lowered in Belle. We can say that the operational amplifiers are all alive. Before hybrids were mounted, the response of PINs to a light source was measured and all 1:100 gain ratio was confirmed for all hybrids (Zontar). By using the real parts, we learned how to fix tiny components with conductive glue (Zhang), how to prepare wire-bonding jigs (Tsuboyama), wire bonding to cylindrical surface which fits the beam pipe radius (Tajima) , how to encapsulate the components (Stanic), soldering tiny components and high density cables (Zontar), and how to peel the flex circuits from the bonding jigs after encapsulation (Zhang). Therefore the yield shown above is extraordinary. ===================================================================== The RTDs on beam pipe are also alive. The temperature could be really measured this morning. Position of RTDs are taken from Stanic's mail. Temperatures are lowest at 4 cm from the Be-Al edges where SVD end rings are close. (Z is measured from the Be-Endring borders) Cable pins RTD Z Phi Temperature ID (cm) (degree) at Aug 21 9:00 F-1 1- 4 1 37 270 22.7 F-1 5- 8 2 26 290 22.9 F-1 9-12 3 14 315 23.4 F-1 13-16 4 4 315 19.7 F-1 17-20 10 33 180 22.3 F-1 21-24 Water1 (BP coolant) 22.0 F-1 25-28 Water2 (BP coolant) 22.0 F-1 29-32 Helium (BP coolant) 22.0 F-2 1- 4 12 29 160 22.0 F-2 5- 8 Flange 270 22.2 F-2 F-2 F-2 F-2 F-2 F-2 B-1 1- 4 9 Be Center 180 20.8 B-1 5- 8 5 Be Center 0 20.6 B-1 9-12 6 4 330 18.9 B-1 13-16 8 31 0 22.2 B-1 17-20 7 12 330 22.4 B-1 21-24 Water1 (BP coolant) 22.1 B-1 25-28 Water2 (BP coolant) 22.1 B-1 29-32 Helium (BP coolant) 21.9 B-2 1- 4 11 24 260 22.5 B-2 5- 8 Flange 170 22.1 B-2 B-2 B-2 B-2 B-2 B-2 =================================================== RTDs on SVD have already been used in the SVD14 system test in B4. The temperature shown here was measured after the test ended and cooling water was purged. CABLE Pins Layer Position Phi Temperature (degree) at Aug 21 9:00 F-1 1- 4 L-1 +X Endring 60 22.1 F-1 5- 8 L-1 +X Heat sink 60 22.2 F-1 9-12 L-2 +X Endring 60 22.8 F-1 13-16 L-2 +X Heat sink 60 22.1 F-1 17-20 L-3 +X Endring 60 22.9 F-1 21-24 L-3 +X Heat sink 60 22.1 F-1 25-28 L-1 -X Endring 90 22.4 F-1 29-32 L-2 -X Endring 90 22.4 B-1 1- 4 L-1 +X Endring 60 22.2 B-1 5- 8 L-1 +X Heat sink 60 22.1 B-1 9-12 L-2 +X Endring 60 22.1 B-1 13-16 L-2 +X Heat sink 60 22.2 B-1 17-20 L-3 +X Endring 60 21.9 B-1 21-24 L-3 +X Heat sink 60 22.1 B-1 25-28 L-1 -X Endring 90 22.5 B-1 29-32 L-2 -X Endring 90 22.4 ==================================================================== The Radiation Damage Monitor (RDM) sensors prepared by Wollongong and Sydney collaboration were also checked. The data shown here could be of no sense since RDM resistance at very low voltage were measured with a DVM. Phone connector wire Position ID Green-Yellow Black-Blue F- 45 7 1.3 M Ohm 4.1 M Ohm F-100 1 3.8 M Ohm 4.4 M Ohm F-180 3 3.5 M Ohm 4.1 M Ohm F-270 5 3.7 M Ohm 4.1 M Ohm B- 60 2 3.8 M Ohm 4.3 M Ohm B-150 4 3.8 M Ohm 4.5 M Ohm B-240 6 3.6 M Ohm 4.0 M Ohm B-335 8 3.8 M Ohm 4.0 M Ohm Some wires had to be cut when RDM were installed to SVD. I hope I fixed the wires in the correct way. Some RDM sensor interfered with the back-ground-shield masks and should be shifted in phi. (Please read Stanic's July-31 mail also.) T.T. is afraid F-45 sensor was damaged while it was installed. ============================================================== In the ABC region, one Humidity sensor is installed in the forward, and two AMINOGLAY radiation-dose monitors on both forward and backward. Various information are taken from the mail from S.Stanic on July 31. Best regards, Toru Tsuboyama (KEK). --- From toru.tsuboyama@kek.jp Mon Aug 28 23:42:07 2000 Date: Mon, 28 Aug 2000 15:04:01 +0900 From: Toru Tsuboyama Subject: cable pin assignment for Hybrids Pin assignments for Hybrid cables are as follows, -------+-------------- Cable | Signal Pins | Assignement -------+-------------- 1 21 | RAD1 K 2 22 | RAD1 R 3 23 | RAD1 C 4 24 | RAD2 R 5 25 | RAD2 K 6 26 | RAD2 C 7 27 | PIN1 GND 8 28 | PIN1 Out 9 29 | PIN1 -10V 10 30 | PIN1 +10V 11 31 | RTD1 +S 12 32 | RTD1 -S 13 33 | RTD2 +SR 14 34 | RTD2 -SR 15 35 | PIN2 GND 16 36 | PIN2 Out 17 37 | PIN2 -10V 18 38 | PIN2 +10V 19 39 | RTD1 -R 20 40 | RTD1 +R -------+--------------- RAD1 --- First set of RADFETs RAD2 --- Second set of RADFETs PIN1 --- Low gain PIN diode PIN2 --- High gain PIN diode RTD1 --- RTD close to the sensor (4-wire readout) RTD2 --- RTD close to the operational amp (2-wire readout) -------+------------------- 40pin | Hybrid Assignment Cables | 1-20 21-40 -------+------------------- F1/B1 | BP- 0 BP- 90 F2/B2 | BP-180 BP-270 F3/B3 | SVD-270 SVD- 0 F4/B4 | SVD- 90 SVD-180 -------+-------------------