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Important locations

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• FACET elog: http://physics-elog.slac.stanford.edu/facetelog/
• Important nodes: "rhel6-64.slac.stanford.edu" (general login node) "mcclogin" (node to reach the control servers) "facet-srv01" (control server, which requires access as fphysics@facet-srv01)
• Data storage: /nfs/slac/g/facetdata/nas/nas-li20-pm00 (accessible from, e.g., mcclogin) [eventually mirrored from: /nas/nas-li20-pm00/E320/ (which is accessible from facet-srv20)]
• Data from first run: /u1/facet/matlab/data (you can access e.g., from fphysics@facet-srv20)
• Scopedata: /u1/facet/physics/e320/scopedata/ (copied to /nas/nas-li20-pm00/E320/)
• Attention: one might need to work explicitly in "bash" to use wildcharacters, e.g., : scp -r fphysics@facet-srv01:/u1/facet/physics/e320/scopedata/2021_08_13___22* /afs/slac/u/gu/smeuren/scopedata/

Example data analysis procedure

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(Version A)

1. Go to the FACET elog: http://physics-elog.slac.stanford.edu/facetelog/
2. Find the shift summary with information about the data sets taken, e.g., http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2021/32/13.08&pos=2021-08-13T06:00:00
3. Determine which run we want to analyze, e.g., http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2021/32/13.08&pos=2021-08-13T04:50:00
4. (Log into facet-srv20 (you need permission, see FACET Computing): ssh fphysics@facet-srv20 -Y): only needed if the data analysis should be done on the cluster
5. Optional: verify, that you can access the path shown in the elog entry
6. Log into a general SLAC computing note from your own computer, e.g., ssh smeuren@rhel6-64.slac.stanford.edu
7. Get your personal home folder via pwd, e.g., /afs/slac.stanford.edu/u/gu/smeuren
8. Log into mcclogin, e.g., ssh smeuren@mcclogin -Y
9. smeuren@mcclogin $ scp -r fphysics@facet-srv20:/nas/nas-li20-pm00/E305/2021/20210813/E305_00292 /afs/slac/u/gu/smeuren/

Example data analysis procedure (Version B)

Here is how to copy data using the fastx3 webinterface

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Nodes with access to the internet

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1. Log into mcclogin, e.g., ssh smeuren@mcclogin -Y
2. Log into, e.g., ssh smeuren@rhel6-64.slac.stanford.edu -Y
3. start firefox (slow due to x-forwarding)

Read the metadata (matlab) files from python

1. Get access to python (e.g., on facet-srv01): source $PACKAGE_TOP/anaconda/envs/python3.7env/bin/activate On rhel: source /afs/slac/g/lcls/package/anaconda/envs/python3.7env/bin/activate (one might need to explicitly start a bash shell)
2. run python3