Difference between revisions of "CDC old & new preamp noise scope trace study"
From GlueXWiki
m |
m |
||
| Line 27: | Line 27: | ||
<b>Channel 8</b> | <b>Channel 8</b> | ||
{| border="1" cellpadding="2" | {| border="1" cellpadding="2" | ||
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_yves_ch8.jpg|thumb|none|400px|Yves' old preamp - ch8 - ringing]] |
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_beni_ch8.jpg|thumb|none|400px|Beni's old preamp - ch8 - ringing]] |
| − | |width="415pt"|[[Image:ringing | + | |width="415pt"|[[Image:ringing naomi_ch8.jpg|thumb|none|400px|Naomi's new preamp - ch8 - ringing]] |
|} | |} | ||
<b>Channel 9</b> | <b>Channel 9</b> | ||
{| border="1" cellpadding="2" | {| border="1" cellpadding="2" | ||
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_yves_ch9.jpg|thumb|none|400px|Yves' old preamp - ch9 - ringing]] |
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_beni_ch9.jpg|thumb|none|400px|Beni's old preamp - ch9 - ringing]] |
| − | |width="415pt"|[[Image:ringing | + | |width="415pt"|[[Image:ringing naomi_ch9.jpg|thumb|none|400px|Naomi's new preamp - ch9 - ringing]] |
|} | |} | ||
<b>Channel 15</b> <- This channel is always used for Fe-55 measurements | <b>Channel 15</b> <- This channel is always used for Fe-55 measurements | ||
{| border="1" cellpadding="2" | {| border="1" cellpadding="2" | ||
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_yves_ch15.jpg|thumb|none|400px|Yves' old preamp - ch15 - ringing]] |
| − | |width="415pt"|[[Image: | + | |width="415pt"|[[Image:ringing_beni_ch15.jpg|thumb|none|400px|Beni's old preamp - ch15 - ringing]] |
| − | |width="415pt"|[[Image:ringing | + | |width="415pt"|[[Image:ringing naomi_ch15.jpg|thumb|none|400px|Naomi's new preamp - ch15 - ringing]] |
|} | |} | ||
Revision as of 15:01, 30 June 2010
A study was performed using three preAmps:
- Yves' old preAmp : the old preamp that changed behavior a month ago
- Beni's old preAmp: the old preamp used before by Beni.
- Naomi's preAmp : the new preAmp.
Left is always Yves' old preAmp, middle is Beni's old preAmp, right is Naomi's new preAmp
First 2000V was put on the chamber and a random cosmic ray signal was selected:
OK, so far so good. Let's switch the HV off and look at the ringing: the highest amplitude ringing was selected,
so you are looking at the high end of the pedestal:
Channel 1
Channel 8
Channel 9
Channel 15 <- This channel is always used for Fe-55 measurements
