Camilo Carrillo

High Energy Physics 2006 - 2013

Hardware

During the first term of 2006,  I participated in the construction and commissioning of RPC chambers, below a more detailed description of my work there.

Cosmic Stand

Here we have the cosmic stand,  was located in the ISR tunnel (Building 184 CERN Meyrin)

In this stand were tested all the RPC chambers that were installed in the CMS endcap system, behind this test there is a big structure of software and hardware that I helped to use and develop.

The output from the electronics was raw, the interface between this output and tables compatible with the database (ORACLE) was a procedure explained in this document. After the improvements done we got a new procedure, quite shorter and automatic (specially changing the date format)

The information collected in the cosmic stand was stored in a database. Below a list of the stored information:

  • Individual gas gap information, test and results
  • Gap and chamber geometry
  • Scatter plots with different variable from the cosmic Test
  •  Graphs with chamber performance
  • Current plots
  • Trigger configuration
  • ISR Lab temperature and humidity

I have  also developed a visualization software in real time for the files containing the information about the long tests of currents. this plot is an example.

Current trend example produced with the tool 

Assembling RPCs

Below you can find the procedure of assembling RPCs in a sequence of images.

My contribution was mainly in the final step, nevertheless I learnt how to install FEBs (Front End Boards) on the chambers and also the general procedure necessary to assemble a chamber.

Final Test

After all the checks done in the cosmic stand, there was a final procedure that should be done just before the installation of the chamber in CMS, this final check tested the pipes (no leaks) the MAC addresses for the front end boards, etc. This work was done for RE1/3.

HV commissioning

Once a chamber is installed, it is necessary to do again a short HV test in order to check that the trip from ISR to P5 did not affect the chamber. This test monitored the current in the gaps (top and bottom) for one hour. This work was done for RE-1/2.

P5 Cameras

In order to monitor the experiment many cameras were installed in SX5 (most of them have change their place), however the configuration in the CERN network and the understanding of the technology was part of my service work. Here the link to the 3 active cameras. (Update every 10 minutes)

Summary

Construction and Commissioning of the Forward CMS/RPC system, ISR laboratory, Prevessin 904 and P5.