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This commit updates the flasher cut with the following changes:
- no longer require nhit to be less than 1000
- update charge criteria to be that the flasher channel must have a QHS or QHL
1000 counts above the next highest QHS or QHL value in the PC or a QLX value
80 counts above the next highest QLX value
- only check is_slot_early() for missing hits in the PC
These updates were inspired by looking at how to tag flashers in runs 20062 -
20370 which didn't fail the original cut. In particular, the following flashers
were previously not tagged:
Run GTID Comments
--- ---- --------
20062 818162 flasher with only 3 hits in PC
reconstructs at PSUP
ESUMH triggered
20083 120836 high charge missing (in next couple of events)
probably picked wrong flasher PMT ID
20089 454156 nhit > 1000
After this commit the last two are properly tagged.
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This commit updates the QvNHIT cut to not require PMT hits to have a good
calibration to be included in the charge sum. The reason for this is that many
electrical pickup events have lots of hits which are pickup and thus have small
or negative charges. When the charge is low like this the PMT hits get flagged
with the bad calibration bit (I'm not sure if it's because of the PMT charge
walk calibration or what). Therefore, now we include all hit PMTs in the charge
sum if there ECA calibrated QHL value is above -100.
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This commit updates the zdab-reprocess script with the following changes:
- don't run RAA
- don't run a bunch of the other fitters like FTI, etc.
- run the path and RSP fitters
- add --lower-nhit and --upper-nhit command line arguments to control the
primary nhit cut range
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This commit updates the zebra code to store a pointer to the first MAST bank in
the zebraFile struct so that we can jump to it when iterating over the logical
records. I had naively assumed based on the documenation in the SNOMAN
companion that the first bank in a logical record was guaranteed to be a MAST
bank, but that doesn't seem to be the case. This also explains why I was
sometimes seeing RHDR and ZDAB banks as the first bank in a logical record.
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This commit updates the breakdown cut to flag any event in which less than 70%
of the PMT hits have a good TAC value.
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This commit updates the a and b parameters for the gamma distribution used to
describe the position distribution of shower photons produced along the
direction of the muon. Previously I had been assuming b was equal to the
radiation length and using a formula from the PDG to calculate a from that.
However, this formula doesn't seem to be valid for muons (the formula comes
from a section describing the shower profile of electrons and gammas, so it's
not surprising). Therefore, now we don't assume any relationship between a and
b.
Now, the value of a is approximated by a constant since I couldn't find any
functional relationship as a function of energy to describe a very well (and
it's approximately constant), and b is approximated by a single degree
polynomial fit to the values I got from simulating muons in RAT-PAC as a
function of energy.
Note that looking at the simulation data it seems like the position
distribution of shower photons from muons isn't even very well described by a
gamma distribution, so in the future it might be a good idea to come up with a
better parameterization.
Even if I stick with the gamma distribution, it would be good to revisit this
in the future and fit for a and b over a wider range of energies.
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This commit updates plot-energy to select prompt events before applying the
data cleaning cuts. This fixes an issue where we might accidentally classify an
event as a prompt event even if it came after an event that was flagged by data
cleaning. For example, suppose there was a breakdown but for whatever reason
the event immediately after the breakdown wasn't tagged (ignoring the fact that
we apply a breakdown follower cut). If we apply the data cleaning first and
then the prompt event selection, that event would be a part of the prompt
events.
There are several other small updates to plot-energy:
- fix bug in 00-orphan cut
- make michel event selection a separate function
- make atmospheric tag into a separate function
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This commit adds the sub_run variable to the ev array in the HDF5 output file
and updates plot-energy to order the events using the run and sub_run
variables. This fixes a potential issue where I was sorting by GTID before, but
the GTID can wrap around and so isn't guaranteed to put the events in the right
order.
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This commit updates the ITC cut to use the pt1 time which is the ECA + PCA
without charge walk calibration time. The reason is that an event which is
mostly electronics noise may have all low charges which can't be calibrated
with the PCA walk calibration.
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This commit updates the ev.nhit variable to represent the total number of
normal PMTs hit in the event, regardless of if the calibration failed. I added
a new variable ev.nhit_cal which now stores the total number of normal PMTs hit
without any flags.
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This commit adds a field to the pmt_hit struct called best_uncal_q which
represents the best ECA calibrated charge (in units of QHS counts above
pedestals). This is then used in the muon data cleaning cut.
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This commit updates the muon cut to require at least 1 OWL hit which has a high
charge and is early relative to nearby normal PMTs. This replaces the previous
cut criteria which required 2 OWL hits to be early relative to the 10%
percentile of all the normal PMT hits.
This new cut should target external muons better although I still need to do
some testing. In the future I'd like to optimize the distance at which PMTs are
considered nearby. Currently I just use 3 meters which seemed like a good value
based on some initial testing.
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This commit updates is_slot_early() to do the following:
- use median time when checking to see if the time of the PMT hits in the slot
is early relative to nearby PMTs
- return True if the number of nearby PMTs is less than or equal to the number
of hit PMTs in the potential flasher slot
- skip potential cross talk hits when finding the nearby hit PMTs by skipping
hits in the adjacent slots with the same paddle card as the potential flasher
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This commit updates get_event() to assume the PMT type is correct in the
pmt.txt file instead of assuming the SNOMAN bank is correct. The reason for
this is that according to the email from Stan 3/15/9 should be a neck PMT (at
least in the NCD phase) and that is what the pmt.txt file says it should be. In
addition, the changes that Stan said were needed in ccc_type.for never got
made.
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This commit updates is_muon() to use the EHS charge for the OWL tubes since
based on looking at the charges for the OWL tubes it looks like the QHS values
are completely random.
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This commit updates get_event() to fill in the uncalibrated charge and time
info from the calibrated charge and time. The ECA calibrated time and ECA + PCA
without walk correction times (ept and pt1) are just set to the calibrated
time. The uncalibrated charges are set by multiplying the calibrated charge by
the mean high-half point and adding a constant offset, and the ECA calibrated
charges are set by taking the uncalibrated charges and subtracting the offset.
The reason for filling these in is so that we can test the data cleaning cuts
on MC. Although it would be better if these were filled in by the MC, this is
better than nothing.
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This commit updates the zebra code to properly handle all the errors from
get_bytes(). I also updated fit and cat-zdab to not display the errors about
the FTX banks by default unless you run them with the -v command line option.
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This commit updates cat-grid-jobs to only warn once about a mismatch between
the SHA1 of the current zdab-cat program and the grid results, and also cleans
up some of the output.
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This commit updates the submit-grid-jobs script to use my version of splitext()
which removes the full extension from the filename. This fixes an issue where
the output HDF5 files had xzdab in the name whenever the input file had the
file extension .xzdab.gz.
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This commit fixes the FTS cut so that it returns 1 when the event is flagged as
failing the cut. Previously, the function returned the following:
not enough PMT pairs: 0 (fail)
median time > 6.8 ns: 0 (fail)
otherwise: 1 (pass)
This had two issues: the return value wasn't consistent with the rest of the
data cleaning cuts and it should pass if there aren't enough PMT pairs.
Now, I fixed the not enough PMT pairs case and made the return value consistent
with the rest of the data cleaning cuts:
not enough PMT pairs: 0 (pass)
median time > 6.8 ns: 1 (fail)
otherwise: 0 (pass)
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This commit updates the second requirement of the neck event tag to flag events
in which either 50% of the normal PMT hits are at the bottom of the detector
*or* 50% of the ECA calibrated charge is at the bottom of the detector.
This update was added after testing the cut out on run 10058 which is not in
the golden run list and noticing that there were 4 events which were very
clearly neck events but which didn't get tagged.
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This commit fixes a bug in get_shower_weights() and get_delta_ray_weights()
which was causing an inf value to propagate and cause the fitter to crash. The
problem came because due to floating point roundoff the cdf value at the end of
the loop was slightly greater than the last cdf value we wanted which was
causing it to get mapped to cos(theta) = -1 (I think?) and then subsequently
get interpolated to an infinite value for xcdf.
The fix is just to make sure that the x coordinate is always between x1 and x2.
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This commit updates the charge spectrum initialization to convolve the charge
distribution over a wider range to make sure that we have a nonzero probability
of observing charges all the way down to qlo.
The reason for this is that previously for some negative charges the
probability of observing that charge was zero, which was causing the likelihood
to return nan.
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