MCP imaging analysis Offset calibration 1(run 356)
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開始行:
*Offset Calibration 1 [#y4ccd967]
**Detector Configuration [#t4d4e0e0]
&ref(./IMG_0370.JPG,"25%");&br;
-Beta source put inside the beam pipe. Pb Collimator was removed in this moment.
-H30 * W32 * Thickness 5mm, 0.1g/cm^3 Aerogel set on the target position.
-Bi-pass line connected.
-Vacuum chamber was enveloped by light shutter (black cloth)
-Vacuum gauge was turned off.
**condition [#l7d8a07e]
-MCP voltage; Normal configuration
-Beam counter/ Veto counter ; Activated. -950V-108uA. These value was in stable while performing measurement.
-Trigger; MCP self trigger.
-TDC; 200ns full scale, 12bit
-TDC-ch config; ch0-ch5 MCPZ1 - MCPY2, ch6 BC, ch7 Veto coincidence
**purpose run 0356[#m09c1d77]
This run 0356 motivated that we gonna investigate an system ability of detection slow electrons, or secondary electrons from an Aerogel.
**This analysis [#wb720ca9]
Offset study. Offset contained each layers should be found or decided. &br;
**result [#g2f9b16c]
&ref(./MCP0356-1.gif);
&ref(./MCP0356-2.gif);&br;
-1st picture: left;TDC raw histograms, center;2D images w/o BC_ON cut, right; 2D images w/ BC ON(tdc stopped within 4095) and Veto OFF(tdc overflow beyond 4095)
--from upper, u&w layer / w&v layer / u&v layer were used to construct image.
-2nd picture: left;residual histogram X_u&v - X_v&w(upper)/X_v&w-X_w&u(center)/X_w&u - X_u&v(lower) , right; residual histogram Y_u&v - Y_v&w(upper)/Y_v&w-Y_w&u(cetner)/Y_w&u - Y_u&v(lower)
--Configuration of "n"&"m",n,m=u,v,w were checked.(3:00 3rd Nov)
***residual -> OFFSET [#ib5787e2]
&size(14){If Offsets were "constant", each residual plot would be like a delta function shape...It shouldn't have a width.};&br;
&size(14){X_v - X_w residual plot is exactly delta shape. This can be deduced analytically.};&br;
&size(14){};&br;
&size(14){};&br;
終了行:
*Offset Calibration 1 [#y4ccd967]
**Detector Configuration [#t4d4e0e0]
&ref(./IMG_0370.JPG,"25%");&br;
-Beta source put inside the beam pipe. Pb Collimator was removed in this moment.
-H30 * W32 * Thickness 5mm, 0.1g/cm^3 Aerogel set on the target position.
-Bi-pass line connected.
-Vacuum chamber was enveloped by light shutter (black cloth)
-Vacuum gauge was turned off.
**condition [#l7d8a07e]
-MCP voltage; Normal configuration
-Beam counter/ Veto counter ; Activated. -950V-108uA. These value was in stable while performing measurement.
-Trigger; MCP self trigger.
-TDC; 200ns full scale, 12bit
-TDC-ch config; ch0-ch5 MCPZ1 - MCPY2, ch6 BC, ch7 Veto coincidence
**purpose run 0356[#m09c1d77]
This run 0356 motivated that we gonna investigate an system ability of detection slow electrons, or secondary electrons from an Aerogel.
**This analysis [#wb720ca9]
Offset study. Offset contained each layers should be found or decided. &br;
**result [#g2f9b16c]
&ref(./MCP0356-1.gif);
&ref(./MCP0356-2.gif);&br;
-1st picture: left;TDC raw histograms, center;2D images w/o BC_ON cut, right; 2D images w/ BC ON(tdc stopped within 4095) and Veto OFF(tdc overflow beyond 4095)
--from upper, u&w layer / w&v layer / u&v layer were used to construct image.
-2nd picture: left;residual histogram X_u&v - X_v&w(upper)/X_v&w-X_w&u(center)/X_w&u - X_u&v(lower) , right; residual histogram Y_u&v - Y_v&w(upper)/Y_v&w-Y_w&u(cetner)/Y_w&u - Y_u&v(lower)
--Configuration of "n"&"m",n,m=u,v,w were checked.(3:00 3rd Nov)
***residual -> OFFSET [#ib5787e2]
&size(14){If Offsets were "constant", each residual plot would be like a delta function shape...It shouldn't have a width.};&br;
&size(14){X_v - X_w residual plot is exactly delta shape. This can be deduced analytically.};&br;
&size(14){};&br;
&size(14){};&br;
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