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--- strutture:lnf:da:btf:dispositivi:btf_diagnostic:wcm [2011/11/23 18:26] – foggetta@infn.it
+++ strutture:lnf:da:btf:dispositivi:btf_diagnostic:wcm [2022/07/11 15:14] (current) – foggetta@infn.it
@@ Line 1: / Line 1: @@
+==== WCM ====
+//OUTSIDE BTF LINE//\\
+Two WCM are placed before the pulsed magnet (WCMTM01) and after SLTB001 (WCMTB01)\\
+One WCM is installed at the end of the DHSTB002 dipole straight line (WCMTB02).\\
+**BERGOZ ICT 122-070-05-1**\\
+[[http://www.bergoz.com/index.php?option=com_content&view=article&id=29&Itemid=37|Bergoz site Link]]\\
+{{:strutture:lnf:da:btf:diagnostica:wcm_bergoz.pdf|Manual}}
+\\
+**Current to charge conversion with QDC:**
+After having performed a pedestal subtraction, the ADC value is converted to charge with this formula:\\
+ADC(pede sub)/4095*FS(ch)*G= Q [pC]\\
+where:\\
+  * ADC(pede sub) = pedestal subtracted ADC value
+  * FS(ch)= range in [pC] of the selected dual range channel  (100pC or 900pC, new version of V965)
+  * Q is the charge expressed in pC
+  * G=10(WCM btf), 20(WCM linac)
+**Current to charge conversion with One electron:**
+Put on peak the value of
+  * 0.819 for a 800pC
+  * 0.728 for 900pC
+  * 6.552 for 100pC
+and validate,\\
+\\
+the #ele control will measure the value of total integrated charge in unit of 10^7 electrons\\
+**Current to charge conversion with oscilloscope:**
+  -- Integrated Charge with measure reference bars (measure outputted by scope)= C [pV*s]
+  -- Pedestal = F[pV*s] (same as signal measure, triggered with DHSTB001 in stby mode)
+  -- Internal resistance = R[Ohm]
+  -- Bergoz monitor calibration => Q(beam)/Q(out) @ 50 Ohm = g = 10(btf) 20(linac)
+  -- Bunch pulse width = dt [ns]
+Formula to obtain induced charge on WCM via scope:
+  Q[pC]=g*[(C-F)/R]
+Formula to obtain mean current from single bunches (To be compared with LINAC WCMTM001 in order to measure transport efficiency):
+  I[mA]=  { g*(C[pVs]-F[pVs]) /50[Ohm]}/dt[ns]
+Measure 20131213 on WCMTB002 (straight line) with pedestal subtracted (201312101258.ped) of value (63.02/2.17)(484.41/16.76)