Here is what I have in my notes about the history after the shutdown:
History of after-shutdown running:
Karen changed all buffer switches on TDCs to buffer mode during
shutdown
8390: first ABS run after shutdown
8444: missing TDC events were noticed the first time. L15 show no ADCs
8479: first run after first Dtunnel session, all TDCs still in buffer
mode, L15 show event mismatch ADC/TDC
8500: first run with L15 TDC switched to single readout then it was
noticed again that missing TDC event still reoccur
8598-8634 investigation, setting all switches to single readout and
swapping modules
8637: first good run for neutron counters (and others?!)
The thing is that all TDC modules were set to buffered readout until 8637
which potentially has the danger of event desynchronization. In case of
L15 it was worst, likely to affect (e,e'n) at higher Q2 and low pm.
(e,e'd), (e,e'p), (e,e'n) users: Please check your analysis separately for
runs 8390-8598 which were marked as good in Chi's list and compare it to
other datasets:
> Jun 30: low pol low flux?
> Jun 30: 8390-8395 8397-8404 8406-8413 8415-8422 8425-8431
> 8433-8440 8442
> - July new cell high polarization observed
> Jul 02: 8479-8486 8488-8494 8496 8500-8513
> Jul 03: 8515-8522 8524-8531 8533-8534 8537-8540
> Jul 04: 8543-8546 8548-8554
> Jul 05: 8564-8568 8570-8583 8585-8588
> Jul 06: 8590-8592 8594-8598
> - July tdc offset problems new sc_cal
> Jul 07: 8648-8655 8657-8664 8666-8673
....
Regards,
Michael
--+-------------------------------------+--------------------------+ | Office: | Home: | |-------------------------------------|--------------------------| | Dr. Michael Kohl | Michael Kohl | | Laboratory for Nuclear Science | 5 Ibbetson Street | | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 | | Middleton, MA 01949 | U.S.A. | | U.S.A. | | | - - - - - - - - - - - - | - - - - - - - - -| | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de | | Work: +1-617-253-9207 | Home: +1-617-629-3147 | | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 | | http://blast.lns.mit.edu | | +-------------------------------------+--------------------------+
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