First Time Users Guide
The following is a collection of useful facts that First Time Users of NSRL
should familiarize themselves with.
- If you have any questions, contact the NSRL Liaison Physicist
(631-344-3072 or 631-344-5830).
- You MUST have a dry run of your experiment before conducting your
first NSRL run.
- When planning an exposure the time you need for each sample exposure
should include time to change samples. If RHIC is running, the
sample changing time is approximately 7 minutes. If RHIC is not
running, time to change samples is only about 4 minutes.
- The size of the radiation field that can uniformly expose a set of
samples can be as large as 20 x 20 cm2 for most ions and
energies. By special request, the NSRL beam can operate in Large
Beam mode with a 60 x 60 cm2 usable beam size.
Issues Specific to Biology Experiments
- For users preparing cell exposures, and Incubator is available to keep
cell samples at a constant temperature and humidity during the length of
their exposure. The exposure field for samples inside the incubator
is only 15 x 15 cm2.
- Standard sample holders
are available for cells at NSRL. Holders for various types of T75,
T25, and test tube sizes have already been made up. If the sample
holders do not fit your needs, custom sample holders can be prepared with
a few hours advance notice. If you are bringing your own sample
holders, make yourself familiar with the information regarding
beam fragmentation and the documentation on
- A Sample Flipper is
available that allows flasks to remain horizontal until the time of
exposure, keeping the cells in the medium as long as possible.
- There are "multiple
holders" that allow up to 10 samples to be placed in the beam per
exposure. In most cases, the time taken to load the samples into the
sample holders is longer than the exposure itself, and so there is no
benefit in planning to expose a large number of samples in a single entry.
At the request of users, custom sample holders can be fabricated at NSRL
with only a few hours notice.
- For exposures to only part of a sample, collimators can be arranged
that shield all parts of a sample except for the region to be exposed.
Issues Specific to Physics Experiments
Physics experiments can make use of several sample holders that make
exposures more efficient.
- A Rotation Table allows
experiments to be mounted centered on the beam and rotated to any angle
with an accuracy of ~1 degree.
- A Translation Table
allows many samples to be mounted on a table that can be remotely
controlled to move samples into or out of the beam without any access
- Users are expected to bring self-contained experiments, but there
exists a data acquisition facility at NSRL composed of a VME crate with a
variety of ADCs, TDCs, and Scalers that can be used to accommodate most
physics experiments. Data rates in excess of 2kHz (600
events per spill) are practicable, with data recording in the format of
ASCII files or ntuples. Contact the NSRL Liaison Physicist (631-344-3096
or 631-344-6102) for more
Last Modified: December 28, 2009
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