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SSRL operates as a dedicated synchrotron radiation source for ~9 months per
year (usually from November through July). Submitting a proposal is only the
first part of the process for getting beam time at SSRL. Once a proposal is
rated/approved for beam time, the spokesperson must request beam time for each
scheduling period in which he/she is interested in running an experiment.
User Research Administration (URA) will
send out a Call for Beam Time Requests
to Spokespersons for all active proposals approximately three
months in advance of each scheduling period. All proposals that are active for
at least part of a given scheduling period are eligible for beam time during
the entire period. A Beam Time Request hardcopy mailing goes out to
spokespersons (or designee) with X-ray/VUV proposals. The "Call" goes out as
an email message to spokespersons with Macromolecular Crystallography proposals.
Reminders are posted under the User Research
Announcements section of SSRL's monthly newsletter, Headlines.
Experimenters are requested to either fill out hardcopy forms or submit
their requests via the web by the stated deadline.
Scheduling is done primarily on the basis of the
proposal's rating (see ratings scales for X-ray/VUV
and Macromolecular
Crystallography proposals). A number of factors beyond the rating may
come into play in making the final determination as to which proposals will
receive beam time and on what beam line. This is driven by the scarcity of
beam time and the large number of proposals of equally high scientific merit.
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Consideration may be given to graduate students completing their thesis work.
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If a single Spokesperson has several proposals that make the "cut" she/he will
not necessarily be granted beam time for each of the proposals. The
Spokesperson is free to choose which experiments she/he would like to run
during the scheduled time.
Beam Time Request Forms
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