View source for Cathode drift potential and count rate runs for 2.97kV GEM

=G4 Simulation=



=01/11/15=


{| border="1" cellpadding="4"
|-
| Date || CATH. Voltage (kV)|| <math>\Delta</math> V|| Shutter || source || run number || Notes
|-

|1/11|| 3.67  || 700 || Open ||off || 8487|| [[File:CATH3.67_GEM2.97_8488c_8487.png |100px ]]
|-
|1/11||3.67 ||700  || Closed || off || 8488|| 
|-

|1/11|| 3.77  || 800 || Open ||off || 8491||  [[File:CATH3.1_GEM2.9_8490c_8491.png |100px ]]
|-
|1/11||3.77 ||800  || Closed || off || 8490|| 
|-



|1/11|| 3.87  || 900 || Open ||off || 8492|| 5' 34" [[File:CATH3.87_GEM2.97_8493c_8492.png |100px ]]
|-
|1/11||3.87 ||900  || Closed || off || 8493|| 
|-


|1/11|| 3.97  || 1k || Open ||off || 8495,96|| [[File:CATH3.97_GEM2.97_8494c_8495.png |100px ]][[File:CATH3.97_GEM2.97_8497c_8496.png |100px ]]
|-
|1/11||3.97 ||1k  || Closed || off || 8494,97|| 
|-

|1/11|| 3.97  || 1k || Open ||on || 8499|| [[File:CATH3.97_GEM2.97_8498c_8499.png |100px ]]
|-
|1/11||3.97 ||1k  || Closed || on || 8498|| 
|-

|1/11|| 4.07  || 1.1k || Open ||off || 8501||  filter amp decreased to from 2x to1x [[File:CATH4.07_GEM2.97_8502c_8501.png |100px ]]
|-
|1/11||4.07 || 1.1k || Closed || off || 8502|| 
|-

|1/11|| 4.07  || 1.1k || Open ||on || 8504|| very low rate [[File:CATH4.07_GEM2.97_8503c_8504.png |100px ]]
|-
|1/11||4.07 ||1.1k  || Closed || on || 8503|| very low rate
|-

|1/11|| 4.07  || 1.1k || Open ||on || 8506|| GEM decreased  from 2.97 to 2.87 kV the rate increased [[File:CATH4.07_GEM2.97_8507c_8506.png |100px ]]
|-
|1/11||4.07 ||1.1k  || Closed || on || 8507|| GEM decreased  from 2.97 to 2.87 kV
|-


|1/11|| 4.07  || 1.1k || Open ||off || 8509|| GEM decreased  from 2.97 to 2.87 kV the rate increased [[File:CATH4.07_GEM2.97_8508c_8509.png |100px ]]
|-
|1/11||4.07 ||1.1k  || Closed || off || 8508|| GEM decreased  from 2.97 to 2.87 kV
|-

|1/11|| 4.07  || 1.1k || Open ||off || 8510|| GEM decreased  from 2.87 to 2.77 kV the rate increased [[File:CATH4.07_GEM2.97_8511c_8510.png |100px ]]
|-
|1/11||4.07 ||1.1k  || Closed || off || 8511|| GEM decreased  from 2.87 to 2.77 kV
|-

|1/11|| 4.07  || 1.1k || Open ||on || 8513|| GEM decreased  from 2.87 to 2.77 kV the rate increased [[File:CATH4.07_GEM2.97_8512c_8513.png |100px ]]
|-
|1/11||4.07 ||1.1k  || Closed || on || 8512|| GEM decreased  from 2.87 to 2.77 kV
|-

|1/12|| 3.87  || 1.1k || Open ||off || 8515|| 6' GEM 2.77 kV [[File:CATH3.87_GEM2.77_8516c_8515.png |100px ]]
|-
|1/12||3.87 ||1.1k  || Closed || off || 8516||
|-


|1/12|| 3.87  || 1.1k || Open ||on || 8518||  GEM 2.77 kV [[File:CATH3.87_GEM2.87_8517c_8518.png |100px ]]
|-
|1/12||3.87 ||1.1k  || Closed || on || 8517||
|-

|1/12|| 3.97  || 1.1k || Open ||on || 8520||  GEM 2.87 kV [[File:CATH3.97_GEM2.87_8521c_8520.png |100px ]]
|-
|1/12||3.97 ||1.1k  || Closed || on || 8521||
|-

|1/12|| 3.97  || 1.1k || Open ||off || 8523|| 6' GEM 2.87 kV [[File:CATH3.97_GEM2.87_8522c_8523.png |100px ]]
|-
|1/12||3.97 ||1.1k  || Closed || off || 8522|| 6'
|-
|1/13|| 3.97  || 1.1k || Open ||off || 8524||  GEM 2.87 kV [[File:CATH3.97_GEM2.87_8526c_8524.png |100px ]]
|-
|1/13||3.97 ||1.1k  || Closed || off || 8526|| 
|-
|1/13|| 3.97  || 1.1k || Open ||on || 8528||  GEM 2.87 kV [[File:CATH3.97_GEM2.87_8527c_8528.png |100px ]]
|-
|1/13||3.97 ||1.1k  || Closed || on || 8527|| 
|-

|1/13|| 4.07  || 1.1k || Open ||on || 8529||  GEM 2.97 kV [[File:CATH4.07_GEM2.97_8530c_8529.png |100px ]]
|-
|1/13||4.07 ||1.1k  || Closed || on || 8530|| 
|-

|1/13|| 4.07  || 1.1k || Open ||off || 8532||  GEM 2.97 kV [[File:CATH4.07_GEM2.97_8532c_8531.png |100px ]]
|-
|1/13||4.07 ||1.1k  || Closed || off || 8531|| 
|-


|1/14|| 3.97  || 1.1k || Open ||off || 8533||  GEM 2.87 kV [[File:CATH3.97_GEM2.87_8534c_8533.png |100px ]]
|-
|1/14||3.97 ||1.1k  || Closed || off || 8534|| 
|-
|1/14|| 3.97  || 1.1k || Open ||on || 8536||  GEM 2.87 kV [[File:CATH3.97_GEM2.87_8535c_8536.png |100px ]]
|-
|1/14||3.97 ||1.1k  || Closed || on || 8535|| 
|-

|1/14|| 4.07  || 1.1k || Open ||on || 8537|| low rate but a higher charge GEM 2.97 kV [[File:CATH4.07_GEM2.97_8538c_8537.png |100px ]]
|-
|1/14||4.07 ||1.1k  || Closed || on || 8538|| low rate but a higher charge
|-

|1/14|| 4.07  || 1.1k || Open ||off || 8540|| low rate but a higher charge GEM 2.97 kV [[File:CATH4.07_GEM2.97_8539c_8540.png |100px ]]
|-
|1/14||4.07 ||1.1k  || Closed || off || 8539|| 7' low rate but a higher charge
|-

|1/14|| 4.27  || 1.3k || Open ||off || 8542|| GEM 2.97 kV [[File:CATH4.27_GEM2.97_8543c_8542.png |100px ]]
|-
|1/14||4.27 ||1.3k  || Closed || off || 8543||
|-


|}

==01/13/15==

;Source on

[[File:1.1k_all_2.79_2.97_closedon.png|100px ]]

[[File:1.1k_all_2.79_2.97_openon.png|100px ]]

[[File:1.1k_all_2.79_2.97_subon.png|100px ]]

;Source off

[[File:1.1k_all_2.79_2.97_closedoff.png|100px ]]

[[File:1.1k_all_2.79_2.97_openoff.png|100px ]]

[[File:1.1k_all_2.79_2.97_suboff.png|100px ]]

==01/13/15==

The figure below shows the difference between open and closed shutter as VGEM=2.97 and VCATH=4.07.

[[File:C3.97_G2.87_openonoff_8536_33.png|100px]]



[[File:C4.07_G2.97_openonoff_8540_37.png|100px]]


The two plots above show a difference as the source is on and when it is off in case of shutter open. But the rate decreases a lot when the GEM voltage increases even after increasing the drift voltage 200V to reach 1.3kV.

GO BACK [https://wiki.iac.isu.edu/index.php/HM_2014#01.2F11.2F15__2.97kV_GEM]