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​How can I print to the FACET e-Log?

Answer Collapse/Expand Text:

While not clear from the help in the FACET e-log, it is possible to print directly to the log. This may save time by allowing a user to simply print from their machine instead of logging in and uploading. After printing, the e-log entry will need to be updated with a title, author, etc.


The attachd pdf document explains how:


​What is the FACET e-log and why do I need to know about it?

Answer Collapse/Expand Text:

​The FACET e-log is an electronic log book that contains details of the FACET run. It used both by the FACET commissioning team and by the experimenters to record running details. 

​What do I need to put in the elog?

Answer Collapse/Expand Text:

​At the end of your beam time, you need to do a summary. The usual content for a summary is the plan for the time, what was actually achieved, what problems were encountered and what work should continue next time. 

You should also document work that you did in the tunnel after a PAMM or user access.

It is very much appreciated if all shifts are well documented with entries throughout explaining what you are doing and what is happening with the machine. The elog is the primary source of communication and it saves people from having to phone you to work out what you are doing and whether there are any problems.

What is the elog etiquette?

Answer Collapse/Expand Text:

​ALWAYS put in names under the author field. Often when people print to the elog, they forget to edit the entry to put their names in rather than printmeta.

Explain what you are doing rather than post a series of pictures without any comments. If you change a setting, note that you changed it rather than just show the result without explaining what you did to achieve it.

You can edit entries but be careful when you do so not to remove actual content. If you write something that you later think wasn't true, don't delete it. That is not good science. You can edit the entry to include an additional comment.

​What counts as beam delivery/downtime etc?

Answer Collapse/Expand Text:


Beam is available for the scheduled program.


User Off
Scheduled FACET user is not able to take the deliverable beam or makes an access.


Beam conditions do not meet the requirements to carry out the scheduled program, and accelerator adjustments are being made to bring the beam to a deliverable state.

Config Δ’s
User has requested a configuration change. Time is the time to restore a deliverable beam.


Accel Down
Accelerator hardware or software problem is preventing the beam from being delivered. User hardware down is NOT Accelerator Down time.  Include specific problems causing downtime in the shift summary, with approximate time (-x.x hours). The EOIC (or their designee) is responsible for creating a CATER(s) to document all accelerator downtime for the shift.
Scheduled Off

PAMM and POMM activities and BCS Checks.

What is the template for a shift summary?​

Answer Collapse/Expand Text:
At the end of your beam time, the experimental team on shift must put in a summary. This really helps communication with the users, accelerator physicists and accelerator operators. We also use the reports from you to write the reports to DOE about how we are using beam time.
To generate and summary go to and fill out the form. You can edit your report as many times as you like and save it to the database. When you are completely finished click on "Save and Submit to Logbook" and the report will be saved in a data-base and also an entry will be made in the FACET e-log. Please check the e-log to ensure the shift summary was added. The link at the bottom of the database report should take you to the e-log entry. If it does not please look at the e-log corersponding to the "Time to Post to E-Log".
Time and date format are YYY-MM-DD HH:MM:SS. You have to follow this format.
Sometime Internet Explorer does not behave. Google Chrome will work under these circumstaces.
The beam parameters needed for the form are the nominal/typical running values for the shift.
The facet elog uses a mark-up text so copy and paste the template below. The mark-up (exclamation marks) make the subsequent text into headings.
Parasitic programs also need to put in their own summary of beam time. Mark it as "parasitic" so it's clear it wasn't the main program. 
An example of the perfect summary. (Needs to be on SLAC network to view- VPN if off-site or on visitor wireless)
Template for shift summary:
Main experiment:
Shift leader/shift personnel:
!To do on next shift
!Brief Summary (~2 sentences that are copied into the DOE report - see examples)
!Delivery to main program
Useful beam time: X hours
Unscheduled down time of accelerator: X hours
Time when beam was good but experimental equipment failed (aka "user off"): X hours
% time accelerator physicist available: ​

​Why are you asking for this information in the shift summary?

Answer Collapse/Expand Text:

​We need to report back to various people- other users, accelerator physicists, accelerator operators and, of course, DOE.

The DOE reports lift a few things from the shift reports- key amongst these is the summary of the beam time.

You can see what other people have written as their summaries here.

​How do I write the perfect "brief summary"?

Answer Collapse/Expand Text:

The "brief summary" in the report at the end of your shift is sent to the Department of Energy.


It should not contain terms that only the experimenters or people at the facility know. General accelerator terms are okay.


It should be succinct. Two or three sentences. It should give a sense of the progress towards meeting your goals.


Examples (courtesy of E200, E210 and E201 respectively):


We have identified the best strategy to perform a tomographic reconstruction of the longitudinal phase space in a time-efficient manner, allowing to considerably reduce the sensitivity of the measure to the drift of the transverse deflecting cavity and of the machine.


Goals for the shift were achieved. Machine response matrix was identified and a reduction of eroneous dispersion by a factor 4 was obtained for the first half of the linac.


Measured ~540MeV/m gradients in a 10cm long, 450um inner diameter dielectric tube with a 25um copper coating. The 54MeV energy change is a world record for dielectric wakefield accelerators. The spectrum of the wakefields excited in the structure agreed with the design predictions.

SLAC SLAC National Accelerator Laboratory, Menlo Park, CA
Operated by Stanford University for the U.S. Dept. of Energy