ALICE Calibration Requirements

HMPID OK August 2006

Par #

Parameter

elements

Data format/size per channel

Data size (Total) Bytes

Update freq

Source

Confirmed

Run type / Trigger type

# of required events/sampling rate

Processing level: sub-event or event

Results: FEE/Archive

Accessible by offline

Calib. Procedure in AliRoot

use case #

on FES

in OCDB

reference

1

Pedestals, Tresholds, Dead maps

7*6*80*48

3 int, 1 float

2.56E+06

0

Run

DAQ

yes

pulser trigger

few thausands (few seconds)

LDC

DAQ FES/OCDB

yes

input for calib.

6

2

HV

21

1 int

1

0

Run

DCS

yes

-

-

-

DCS ArchiveDB/OCDB

yes

input for calib.

4

3

Gain of chamber

7

TF2

1

0

Run

DCS

yes

-

-

-

DCDB

yes

yes

4,6,Offline

4

C6F14 Ref Index

7*3

TF1

7308

0

Run

DCS

yes

-

-

-

DCDB

yes

yes

4

5

T for C6F14

7*3*2

1 float

1

0

Run

DCS

yes

-

-

-

DCS ArchiveDB/OCDB

yes

input for calib.

4

6

P, T for CH4

7*2*2

1 float

1

0

Run

DCS

yes

-

-

-

DCS ArchiveDB/OCDB

yes

input for calib.

4

7

C6F14 transmission

7*3

TF1

1

0

day

DCS

yes

-

-

-

DCDB

yes

input for calib.

-

8

SiO2 transmission

7*3

TF1

1

0

Once

DCDB

yes

-

-

-

DCDB

yes

input for calib.

-

9

CH4 transmission

7

TF1

1

0

day

DCS

yes

-

-

-

DCDB

yes

input for calib.

-

10

CsI QE

7*6*80*48/9

TF2

6.00E+06

0

2/year

DCDB

yes

-

-

-

DCDB

yes

input for calib.

-

8.57E+06

0.00E+00

DCS access - offline has access only to DCS archive DB, curently no access to configuration DB

DAQ - offline has access to raw data and DAQ logbook, but no acccess to LDC or GDC directly

OCDB - Calibration parameters are stored in the Offline Calibration DB. The data used to calculate these parameters, the reference data, can also be optionally archived for later access from offline.