Difference between revisions of "CCDB Tables CDC"

From GlueXWiki
Jump to: navigation, search
(→‎Deprecated)
(→‎Tables)
 
(7 intermediate revisions by one other user not shown)
Line 3: Line 3:
 
==Variations==
 
==Variations==
  
−
These are interesting variations related to the CDC:
+
There are no interesting variations at the moment.
−
 
+
−
* '''CDC_8mm_0T, CDC_9mm_0T, CDC_10mm_0T''' - versions of time-distance tables for different sized straws, no magnetic field
+
  
 
==Tables==
 
==Tables==
Line 11: Line 9:
 
'''CDC/timing_offsets'''
 
'''CDC/timing_offsets'''
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | 1-3522
+
| style="width:70px;" | 1-3522
−
| style="width:40%;" | timing offset, t0 (ns)
+
| style="width:400px;" | timing offset, t0 (ns)
 
|}
 
|}
  
 
'''CDC/wire_gains'''
 
'''CDC/wire_gains'''
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | 1-3522
+
| style="width:70px;" | 1-3522
−
| style="width:40%;" | gain correction factor
+
| style="width:400px;" | gain correction factor
 +
|}
 +
 
 +
'''CDC/pedestals'''
 +
{|class="wikitable"
 +
| style="width:70px;" | 1-3522
 +
| style="width:400px;" | ADC pedestals
 
|}
 
|}
  
 
'''CDC/wire_alignment'''  (3522 rows)
 
'''CDC/wire_alignment'''  (3522 rows)
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | dxu
+
| style="width:70px;" | dxu
−
| style="width:40%;" | upstream wire end displacement - X
+
| style="width:400px;" | upstream wire end displacement - X
 
|-
 
|-
 
| dyu
 
| dyu
Line 38: Line 42:
 
'''CDC/alignment'''
 
'''CDC/alignment'''
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | CDC_ALIGN_UPSTREAM_DZ
+
| style="width:200px;" | CDC_ALIGN_UPSTREAM_DZ
−
| style="width:40%;" | upstream endplate z displacement
+
| style="width:300px;" | upstream endplate z displacement
 
|-
 
|-
 
| CDC_ALIGN_DOWNSTREAM_DZ
 
| CDC_ALIGN_DOWNSTREAM_DZ
Line 48: Line 52:
 
|}
 
|}
  
−
'''CDC/cdc_gas_tables''', 41 rows
+
'''CDC/cdc_drift_table''' (78 rows)
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | 1-100
+
| style="width:70px;" | t
−
| style="width:40%;" | time-to-distance lookup tables
+
| tyle="width:300px;" | drift time (μs) in 100 micron steps
 
|}
 
|}
  
−
'''CDC/drift_parms'''
 
−
{|class="wikitable"
 
−
| style="width:10%;" | CDC_DRIFT_FUNCTION
 
−
| style="width:40%;" | index for which row of CDC/cdc_gas_drift should be used 
 
−
|}
 
  
−
Note - maybe this should be a JANA parameter?
 
  
−
'''CDC/MC/drift\_func\_parms'''
+
'''CDC/MC/drift_func_parms'''
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | CDC_DRIFT_A
+
| style="width:130px;" | CDC_DRIFT_A
−
| style="width:40%;" | Transverse drift function parameters
+
| style="width:400px;" | Transverse drift function parameters
 
|-
 
|-
 
| CDC_DRIFT_B
 
| CDC_DRIFT_B
Line 89: Line 87:
 
|}
 
|}
  
−
'''CDC/fit\_parms'''
+
'''CDC/fit_parms'''
 
{|class="wikitable"
 
{|class="wikitable"
−
| style="width:10%;" | CDC_VARIANCE_A
+
| style="width:130px;" | CDC_VARIANCE_A
−
| style="width:40%;" | Kalman filter parameters
+
| style="width:400px;" | Kalman filter parameters
 
|-
 
|-
 
| CDC_VARIANCE_B  
 
| CDC_VARIANCE_B  
Line 99: Line 97:
 
| CDC_VARIANCE_C
 
| CDC_VARIANCE_C
 
|
 
|
 +
|}
 +
 +
'''CDC/cdc_parms'''
 +
{|class="wikitable"
 +
| style="width:70px;" | CDC_TDRIFT_SIGMA
 +
| style="width:90px;" | 2.8181818181818e-9
 +
| style="width:400px;" | The error on the drift time in the CDC, used to gaussianly smear actual CDC hits.
 +
|-
 +
| CDC_TIME_WINDOW
 +
| 1000.0E-9
 +
| The time window for which CDC hits are accumulated (in sec), used for background determination
 +
|-
 +
| CDC_PEDESTAL_SIGMA
 +
| 0.00000006
 +
| The error in the energy deposition measurement in the CDC due to pedestal noise
 +
|-
 +
| CDC_DRIFT_SPEED
 +
| 0.0055
 +
| CDC drift speed (unit?)
 +
|-
 +
| CDC_TWO_HIT_RESOL
 +
| 25.
 +
| time window for two hit resolution (in ns)
 +
|-
 +
| CDC_MAX_HITS
 +
| 100
 +
| number of hit per readout channel
 +
|-
 +
| CDC_THRESH_KEV
 +
| 1.
 +
| threshold applied (in KeV)
 +
|-
 +
| CDC_STRAW_RADIUS
 +
| 0.8
 +
| straw radius (in cm)
 
|}
 
|}
  
 
==Deprecated==
 
==Deprecated==
  
−
The following tables should not be used anymore:
+
The following tables/variations should not be used anymore:
  
 
* '''CDC/cdc_drift''' - parameterized time-to-distance function
 
* '''CDC/cdc_drift''' - parameterized time-to-distance function
 +
* '''CDC/cdc_gas_drift'''
 +
* '''CDC/drift_parms'''
 +
 +
These are (not anymore) interesting variations related to the CDC:
 +
 +
* '''CDC_8mm_0T, CDC_9mm_0T, CDC_10mm_0T''' - versions of time-distance tables for different sized straws, no magnetic field.  only 25 tables generated, with mixtures of 47/53 to 53/47 of Ar/CO2, in 0.25% increments.

Latest revision as of 11:50, 18 June 2014

Variations

There are no interesting variations at the moment.

Tables

CDC/timing_offsets

1-3522 timing offset, t0 (ns)

CDC/wire_gains

1-3522 gain correction factor

CDC/pedestals

1-3522 ADC pedestals

CDC/wire_alignment (3522 rows)

dxu upstream wire end displacement - X
dyu upstream wire end displacement - Y
dxd downstream wire end displacement - X
dyd downstream wire end displacement - Y

CDC/alignment

CDC_ALIGN_UPSTREAM_DZ upstream endplate z displacement
CDC_ALIGN_DOWNSTREAM_DZ downstream endplate z displacement
CDC_SAG_RADIUS

CDC/cdc_drift_table (78 rows)

t drift time (μs) in 100 micron steps


CDC/MC/drift_func_parms

CDC_DRIFT_A Transverse drift function parameters
CDC_DRIFT_B
CDC_DRIFT_C
CDC_DRIFT_D
CDC_DRIFT_A_L Longitudinal drift function parameters
CDC_DRIFT_B_L
CDC_DRIFT_C_L
CDC_DRIFT_D_L

CDC/fit_parms

CDC_VARIANCE_A Kalman filter parameters
CDC_VARIANCE_B
CDC_VARIANCE_C

CDC/cdc_parms

CDC_TDRIFT_SIGMA 2.8181818181818e-9 The error on the drift time in the CDC, used to gaussianly smear actual CDC hits.
CDC_TIME_WINDOW 1000.0E-9 The time window for which CDC hits are accumulated (in sec), used for background determination
CDC_PEDESTAL_SIGMA 0.00000006 The error in the energy deposition measurement in the CDC due to pedestal noise
CDC_DRIFT_SPEED 0.0055 CDC drift speed (unit?)
CDC_TWO_HIT_RESOL 25. time window for two hit resolution (in ns)
CDC_MAX_HITS 100 number of hit per readout channel
CDC_THRESH_KEV 1. threshold applied (in KeV)
CDC_STRAW_RADIUS 0.8 straw radius (in cm)

Deprecated

The following tables/variations should not be used anymore:

  • CDC/cdc_drift - parameterized time-to-distance function
  • CDC/cdc_gas_drift
  • CDC/drift_parms

These are (not anymore) interesting variations related to the CDC:

  • CDC_8mm_0T, CDC_9mm_0T, CDC_10mm_0T - versions of time-distance tables for different sized straws, no magnetic field. only 25 tables generated, with mixtures of 47/53 to 53/47 of Ar/CO2, in 0.25% increments.
Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=CCDB_Tables_CDC&oldid=57953"