Date: Thu, 8 Apr 2004 16:28:00 +0900 From: iwaida Since it was a KEKB maintenance, Tsuboyama san, Samo san and I did the following work. 1.The signal of the pin placed into the SVD tunnel was connected with IOtech reader. The range of the reader for all channels was set to 1V. 2.Feedback resistance of pin1 and pin3 was changed into 100Mohm from 7.58Mohm, so now it is 100MOhm for all 4 pin diodes. 3.Pin4 was covered with 1mm thick led plate. ----------------------------------------------------------------- IOtech ch pin No. place feedback resistance(ohm) ----------------------------------------------------------------- 27 pin1 HER 100M 28 pin2 HER 100M 29 pin3 LER 100M 30 pin4 LER 100M *covered with Pb. ----------------------------------------------------------------- Best regards, iwaida -- From: "Toru Tsuboyama" Date: Thu, 8 Apr 2004 17:00:05 +0900 After Iwaida and Stanic left B4, Hazumi gave me some time to work with monitor. So I finally introduced diamond signals into IOTECH although I do not know the dynamic range is enough or not. As a result connections are... ----------------------------------------------------------------- IOtech ch pin No. place feedback resistance (ohm) ----------------------------------------------------------------- 27 pin1 HER 100M 28 pin2 HER 100M 29 pin3 LER 100M 30 pin4 LER 100M *covered with a 1mm thick Pb sheet 31 dia0 BELLE ???M *Inside Belle 32 dia1 BELLE ???M *Inside Belle ----------------------------------------------------------------- Since today (8 April 2004), these 6 data will appear in the NTUPLE file. In order to keep the Ntuple format I assigned them to temperature region. tmp(59) --- PIN1 tmp(60) --- PIN2 tmp(61) --- PIN3 tmp(62) --- PIN4 tmp(63) --- DIA1 tmp(64) --- DIA2 I added New pin data to the web graphs. Please take a look at the bottom graph in http://belle.kek.jp/~tsuboy/svdmonitor/ or http://belle.kek.jp/~tsuboy/svdmonitor/pictures/radmon.png They are essentially nt/pl 10.tmp(59)%day nt/pl 10.tmp(60)%day nt/pl 10.tmp(61)%day nt/pl 10.tmp(62)%day nt/pl 10.tmp(63)%day nt/pl 10.tmp(64)%day Best regards, Toru Tsuboyama -- From: "Toru Tsuboyama" Subject: RE: Diamond and PIN Date: Fri, 23 Apr 2004 14:49:43 +0900 Dear colleagues, The aminogray chips irradiated at No3 switchyard at KEKB beam transport were taken out today (April 22) We put them on March 18. (I was not lazy. The April 1 maintenance was cancelled. LINAC was in operation at the April 8 maintenance. Therefore, this is the first regular maintenance of LINAC since March 18.) #010310-248, 249 --- Taken out after 36days irradiation. #030828-141,142 --- Installed today. We modified the Diamond readout module yesterday. Feedback resistors are 22 M Ohm for both channels. Since response of DIAMOND1 and DIAMOND2 is completely different, I exchanged the input cable from diamond sensors. If the behaviors change, two diamonds show different response to beam background. If the behavior is same, we should suspect the amplifier module. Best regards, Toru Tsuboyama -- Date: Fri, 23 Apr 2004 14:52:55 +0900 (JST) From: mlf47053@nifty.com Dear monitoring group, Yesterday,KEKB was maintenance day,Tsuboyama-san, Samo-san, Kameshima-kun, and I did the following work. (1) Feedback resistance of a diamond sensor was changed into 22MOhm and 0.047uF. (2) The filter of 10kOhm and 100uF was made to for the 4 PIN diodes in KEKB. (3) The measurement result of Aminogray irradiated at No3 switchyard of KEK Linac from 2004/03/18-2004/04/22 (36 days) is: ------------------------------------------------------ No. Amplitude [mm] Power [mW] Receiver gain 01310-248 01310-249 ------------------------------------------------------ Dose is calculated as Dose=Amplitude*/... ------------------------------------------------------ No. Total dose(krad) This time dose(krad) 01310-248 2747.18 2275.58 01310-249 524.35 350.82 ------------------------------------------------------ Best regards, Igarashi