1. The primary contacts for
scheduling data collection time on the machines are Diana Tomchick (ND10.214A,
and James Chen (ND10.214F, x8-1207, Zhe.Chen@utsouthwestern.edu).
2. All problems with the machines, computers or cryostreams
should be immediately reported to Raghu (ND10.223C, 5-5937) and the above
3. Initially, time will be allocated according to demands of the project,
subject to availability. Time used for screening of crystals is typically
scheduled during weekdays, and data collection is usually scheduled for
weekends and evenings. Users may be asked to share crystal-screening time
with others in order to use the available time efficiently.
4. Please indicate your preference for machine (left or right port) and the
amount of time you require. The demand for beamtime
varies from week to week, and is especially high prior to synchrotron trips.
5. Please consult the web
before requesting time. If the machine is not in use, check the web calendar to see
if someone is scheduled to use this time.
a. If someone is assigned for this time, you should not use the machine
without the approval of the scheduled user. If you ignore the sign-up calendar and place a
crystal on the machine without prior approval, your crystal may be discarded
b. If the time is not assigned, you may use the machine, but you must let the
primary contacts know. Otherwise someone else may be assigned to use the
time. For administrative purposes, we also need to know who uses the machines
and how much time they use during the year.
6. You should schedule your data collection time to finish at 9 a.m. on the
morning following your last scheduled day.
a. If your data collection will not be finished by that time, you must notify
the next user (check the web calendar!) as
well as the primary contact and obtain their permission for your collection
to continue. They
are not required to accommodate your request for extra time, so be prudent
and conservative when planning your data collection strategy.
b. Do not expect
that the next user will re-freeze your crystal at the end of your data
collection unless you have arranged this with that person. In other words,
the scheduled user of the equipment is allowed to stop any ongoing data
collection and discard any crystal that is still mounted.
7. Generally, the three weekdays prior to a synchrotron trip (i.e. prior to
shipping of the crystals) will be reserved for last-minute screening by
general users on at least one of the detectors.
8. Please transfer your data from the data collection computer to your lab
workstation as soon as possible, and then erase the data from the data
9. All data older than 1 week may be
erased without warning!
10. We reserve the
right to revoke anyone’s privilege to use the shared X-ray equipment if these
rules are willfully violated!