The STAR experiment

Offline Evaluation of L2gamma EEMC 2008 Algorithm

Abstract: We evaluate the 2008 EEMC L2gamma algorithm for run 9050015<

1) ---- archived version of Feb-20 is at

star/u/balewski/2008-trigArchive/2rcf-feb20-official
 

These plots were made from the same set of 5000 single-gamma events as before.  Clusters are 2x2 patches found by looking for towers with E>1, constructing the 2x2 patch containing the seed

I generated a pythia sample with 300k events in each of 8 pt bins: 7-9, 9-11, 11-15, 15-25, 25-35, 35-45, 45-55, 55+.

Each set of plots were made from 5000 events, with a flat pt distribution between 5 and 40 and a flat eta distribution between -.2 and 1.2.  Clustering was done by finding seed towers (towers wit

The pdfs below have plots of the BPRS energy, eta, and phi distributions for 5000 events (piminus and gamma), determined by looping through all preshower hits and selecting those with eta > -.2.&nb

The following is a list of bugs in the L2 code, and their solutions, if we've found them.  Apologies for the sketchy page, it's very late at night for me.

I deployed a private build of SUMS (roughly 1.8.10) on CMSAF and made the following changes to globalConfig.xml to get local job submission working:

In the Queue List

In the Policy List

Now for the Dispatcher

And finally, here's the site configuration block

More details from L2-jet algo in PDF

First things first. I went to http://www2.lns.mit.edu/compserv/cms-acctappl.html and applied for a local account. The welcome message contained a link to the CMSAF User Guide found on this TWiki page.

AFS isn’t available on CMSAF, so I started a local tree at /osg/app/star/afs_rhic and began to copy over stuff. Here’s a list of what I copied so far (nodes are running SL 4.4):

I copied these precompiled libraries over instead of building them myself because of a tricky problem with the interactive nodes’ configuration. The main gateway node is a 64-bit machine, so regular attempts at compilation produce 64-bit libraries that we can’t use. CMSAF has a node reserved for 32-bit builds, but it’s running SL 3.0.5. We’re still working on a proper resolution of that problem. Perhaps we can force cons to do 32-bit compilations.

The environment scripts are working, although I had to add more hacks than I thought were necessary. I only changed the following files:

1. ~/.login
2. ~/.cshrc
3. $GROUP_DIR/site_post_setup.csh

It doesn’t seem possible to change the default login shell (chsh and ypchsh both fail), so when you login you need to type “tcsh” to get a working STAR environment (after copying my .login and .cshrc to your home directory, of course).

Basic interactive tests look good, and I’ve got a SUMS configuration that will do local job submissions to the Condor system (that’s a topic for another post). DB calls use the MIT database mirror. I think that’s all for now.