Below is the plan I sent out before, but with some approximate
luminosities and numbers of shifts required. Feel free to check
my math. I found a lot of variation in the rate calculation,
depending on which run you're trying to scale from, at least
for the MIP runs.
In general, I assumed 750 kbyte/sec data transfer rate if
fiber channel is not available, and 7.5 Mbyte/sec if it is.
I assumed two working drift chambers, and 2.5 kbytes/event per
chamber (based on run 778 and 779). For the MIP runs I assumed
250 bytes/event, no drift chambers. I ignored any rate dependence
on beam energy.
Any comments you may have are welcome.
- Will
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Run plan request for forward calorimeter (also partly CC)
Assumptions:
All sectors operational and gain-balanced by cosmics when possible.
All missing tubes identified and fixed when possible.
All adc-tdc cabling verified.
----------------------------------------------------------------
----------------------------- MIP run --------------------------
----------------------------------------------------------------
4 GeV beam energy.
Trigger EC low, IN*OUT.
No DC data to tape.
Minitorus ON
IF NO FIBERCHANNEL:
Luminosity 4 - 10 * 10^34 @ 750 kbyte/sec at 250 bytes/event
Prescale by factor 4 to get <5% cosmics
Number of shifts = 3
Number of triggers = 130 million
IF FIBERCHANNEL WORKING:
Luminosity 8 - 20 * 10^34 @ 750 kbyte/sec at 250 bytes/event
No prescale, get <1% cosmics
Number of shifts = 1
Number of triggers = half a billion
Do FIRST in run period.
NOTE: need to set thresholds carefully to exclude background.
Background may depend on tune, => optimal thresholds may also.
Possible iterations of sector 1 and 4 HV will occur for gain match.
Purposes: hardware gain match sector 1 and 4
compare software gains from cosmics w/ gains from ~MIP.
compare attn lengths derived from cosmics with ~MIP.
timing offsets for narrow adc range, penetrating particles
----------------------------------------------------------------
-------------------- e+p with B-field #1 -----------------------
----------------------------------------------------------------
4 GeV beam energy, full field, INbending electrons
Trigger EC HI, < 800 MeV thresh, as low as possible
Minitorus ON
IF NO FIBERCHANNEL:
Luminosity 3 * 10^33
Number of shifts = 1.5
Number of triggers = 5 million
IF FIBERCHANNEL WORKING:
Luminosity 3 * 10^34
Number of shifts = 1
Number of triggers = 30 million
Purposes: energy calibration, in i-j bins and global
energy linearity, i-j bins and global, higher energy range
derive timing walk functions, time offsets
exclusive reaction studies
----------------------------------------------------------------
-------------------- e+p with B-field #2 -----------------------
----------------------------------------------------------------
1.6 or 2.4 GeV beam energy, one-quarter or one-half field, INbending electrons
Trigger EC HI, < 300 MeV thresh, as low as possible
Minitorus ON
IF NO FIBERCHANNEL:
Luminosity 3 * 10^33
Number of shifts = 1.5
Number of triggers = 5 million
IF FIBERCHANNEL WORKING:
Luminosity 3 * 10^34
Number of shifts = 1
Number of triggers = 30 million
Purposes: energy calibration, in i-j bins and global
high electron statistics at ~same angles as at 4 GeV
energy linearity, i-j bins and global, lower energy range
derive timing walk functions, time offsets
exclusive reaction studies
----------------------------------------------------------------
-------------------- e+p with B-field #3 -----------------------
----------------------------------------------------------------
1.6 or 2.4 GeV beam energy, full field, OUTbending electrons
Trigger EC HI, < 300 MeV thresh, as low as possible
Minitorus ON
IF NO FIBERCHANNEL:
Luminosity 3 * 10^33
Number of shifts = 1.5
Number of triggers = 5 million
IF FIBERCHANNEL WORKING:
Luminosity 3 * 10^34
Number of shifts = 1
Number of triggers = 30 million
Purposes: Cerenkov counter efficiency, outbending neg. particles
energy calibration, in i-j bins and global
high electron statistics at ~different angles from previous
energy linearity, i-j bins and global
derive timing walk functions, time offsets
exclusive reaction studies
magnetic field shielding (?) Cerenkov counter
----------------------------------------------------------------
-------------------- e+p with B-field #4 -----------------------
----------------------------------------------------------------
4 GeV beam energy, full field, OUTbending electrons
Trigger EC HI, < 800 MeV thresh, as low as possible
Minitorus ON
IF NO FIBERCHANNEL:
Luminosity 3 * 10^33
Number of shifts = 1.5
Number of triggers = 5 million
IF FIBERCHANNEL WORKING:
Luminosity 3 * 10^34
Number of shifts = 1
Number of triggers = 30 million
Purposes: Cerenkov counter efficiency for pi+ (infer pi- inbend. effic.)
energy calibration, in i-j bins and global
high electron statistics at ~different angles from previous
energy linearity, i-j bins and global
derive timing walk functions
exclusive reaction studies
----------------------------------------------------------------
-------------------- other possiblities? -----------------------
----------------------------------------------------------------
trigger with other detectors, e.g. TOF prescaled, TOF*EC