TWIKIS ARE TERRIBLE

About Me

I am a physics PhD student attending Rutgers University. I'm currently at CERN. My name is sometimes Tote Hughes.

Notes

detId

(32-bit unsigned integer)

This variable identifies a place in the CMS detector. The 4 most significant bits (MSBs) identify the CMS sub-detector:

• 1 - Tracker
• 2 - Muon
• 3 - ECal
• 4 - HCal

The next 3 bits identify the sub-detector component.

In my project, I encounter 3 different detId ranges:

• 1.107E9 = 0100 000 1111110110111101011000000
  • sub-detector (SD) = "0100" = "4" = "HCal"
  • component (SDC) = "000" = "0"
• 1.140E9 = 0100 001 1111100110000010100000000
  • SD = "HCal"
  • SDC = "1"
• 1.207E9 = 0100 011 1111100010101101111000000
  • SD = "HCal"
  • SDC = "3"

QIE10/11

More information (Outdated)

CMSSW

Event Info (eventInfo)

I will call the collection of run, lumi, and event eventInfo. eventInfo is an object of class EventID (DataFormats/Provenance/interface/EventID.h). The Event class contains an EventID, which can be accessed with id. Therefore,

cout << iEvent.id() << endl;

returns

run: 176466 lumi: 45 event: 75893703

which is the same output as results from

cout << "run: " << iEvent.id().run() << " lumi: " << iEvent.id().luminosityBlock() << " event: " << iEvent.id().event() << endl;

CMSLPC

Grid certificate information

To initialize a grid proxy, use:

voms-proxy-init --voms cms

This will be valid for 12 hours by default. Should you need more time, use:

voms-proxy-init --voms cms -valid [hh:mm]

Miscellaneous

To copy a xrootd file, use:

xrdcp root://xrootd.unl.edu/[LFN] [local path]