DTDPGResults04032014-2 < CMSPublic

CMSPublic Web>PhysicsResults>MuonDPGResults>DTDPGResults24102013>DTDPGResults04032014-1>DTDPGResults04032014-2 (2014-03-19, FrancescaCavallo) (raw view)

EditAttachPDF

---+++Measurement of current drawn by DT chambers as a function of LHC instantaneous luminosity
</br>

   * The currents drawn by DT chambers were measured during LHC operation, Fills 2683 to 2728. The currents were read from the DT HV modules CAEN A877.

   * The shown values were obtained by averaging the currents of all wires and layers of a given chamber for 10 minutes. The current measured for the same chamber in no-beam conditions was subtracted from the result.

   * The results are plotted as a function of LHC instantaneous luminosity, as read from the LHC Operation Page.

   * The highest values of currents were found in the top sectors (Sect.4) of the outermost station (MB4),  where the background is maximum.  This is due to the presence of
      collision induced "neutron gas", setting up between the detector and the cavern's ceiling. 

   * For each wheel, MB1 currents were verified to be Phi symmetric.  They are higher in the external wheels  (YB-2, YB+2) due to higher track multiplicity.
</br>

     <img src="%ATTACHURLPATH%/currents_mb1_new.png" alt="current_mb1.png" width="696" height="472" />

__Current drawn by the chambers MB1/Sect4 of all wheels as a function of LHC instantaneous luminosity__

 </br>
     <img src="%ATTACHURLPATH%/currents_mb4_new.png" alt="currents_mb4.png" />

__Current drawn by the chamber MB4/Sect4 of all wheels as a function of LHC instantaneous luminosity__

</br>

-- Main.FrancescaCavallo - 18 Mar 2014

Topic revision: r2 - 2014-03-19 - FrancescaCavallo

CMSPublic

Create a LeftBar

Public webs

- Cern Search
- TWiki Search
- Google Search
CMSPublic All webs

Copyright &© 2008-2023 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
or Ideas, requests, problems regarding TWiki? use Discourse or Send feedback