Differences between revisions 17 and 19 (spanning 2 versions)
Revision 17 as of 2011-06-17 08:23:19
Size: 2711
Editor: ShaojunLu
Comment:
Revision 19 as of 2013-08-29 08:17:21
Size: 3151
Editor: ShaojunLu
Comment:
Deletions are marked like this. Additions are marked like this.
Line 28: Line 28:
||<rowspan=3> '''ahc_ic_constants_006''' ||2006 - 2009 || same as '''ahc_ic_constants_004''' ||
|| C10 || same as '''ahc_ic_constants_005''' ||
|| C11 || TODO: get the information from provider? ||
||<rowspan=3> '''ahc_ic_constants_007''' ||2006 - 2009 || same as '''ahc_ic_constants_004''' ||
|| C10 || same as '''ahc_ic_constants_005''' ||
|| C11 || same as '''ahc_ic_constants_006''', and extended, available for the whole year ||

HCal Electronics Intercalibration

Constants of the electronics intercalibration have units [ADUc/ADUp], where ADUc and ADUp are ADC units in calibration and physics mode, respectively.

Storage / Availability

The constants are made available in the database in folder

/cd_calice/Hcal/ic_constants 

Every entry gets tagged to allow permanent reference. Users are encouraged to use tags rather than the HEAD, i.e. make sure they know which assumptions are valid on the constants they use.

Tag description: ic_constants

Tag

Time / HV Period

Description

ahc_ic_constants_001

2006 - 2009

Cleaned-up averages from CERN 2007 measurements. Missing values: use cleaned-up average from 2008 measurements, if available.

ahc_ic_constants_002

C06

Cleaned-up averages from CERN 2007 measurements. Missing values: use cleaned-up average from DESY re-calibration measurements, if available (modules 1, 2, 14, 25 only).

C07

C08-1

Cleaned-up averages from FNAL 2008 measurements.

C08-2

C08-3

C08-4

ahc_ic_constants_003

2006 - 2009

Copy of ahc_ic_constants_001, add collection parameters for default values (default IC = 10)

ahc_ic_constants_004

2006 - 2009

Copy of ahc_ic_constants_002, add collection parameters for default values (default IC = 10)

ahc_ic_constants_005

2006 - 2009

same as ahc_ic_constants_004

C10

Value updated by Clemens, the value were extracted by Jara from C10.

C11

Value from C07

ahc_ic_constants_006

2006 - 2009

same as ahc_ic_constants_004

C10

same as ahc_ic_constants_005

C11

TODO: get the information from provider?

ahc_ic_constants_007

2006 - 2009

same as ahc_ic_constants_004

C10

same as ahc_ic_constants_005

C11

same as ahc_ic_constants_006, and extended, available for the whole year

outdated intercalibration folders

The tags of some outdated intercalibration folders are still listed here.

Measurement

coming soon...

Clean-up Procedure

Since the spread of the differences between single measurements and the average values for each channel appears to be much larger than the expected 1-2% a selection procedure is applied to reduce it. All measured values for each single channel are sorted by size. Starting in the middle and going up, the relative differences between subsequent values are checked. As soon as a jump of more than 1% is encountered, the remaining values in this direction are removed. Afterwards, the same is done for the opposite direction, this time starting one value before the middle and going down. The remaining values are averaged. This reduces the spread mentioned above to the expected range.

HCAL Inter (last edited 2013-08-29 08:17:21 by ShaojunLu)