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Field strength is set correctly. There is some uncertainty about the correct length for the box field; v4 and older use the physical length of the magnet bore (36 inches = 91.44 cm) and v5 uses the FWHM of the measured field at y = 0 (108 cm), which should give approximately the correct integrated field. Note the field definition in v5 has changed in the last couple of weeks (this is what we mean by "not yet a production detector" - we're still making changes in CVS). A good test is to manually fire single beam-energy electrons into the detector and see where they go. "slic -n" will give you a Geant4 interactive shell, and there are tutorials online for what you can do there. There are tools for viewing stdhep events, but probably the easiest thing for you to do is to look at the MCParticles in the SLIC output in JAS. The stdhep particles should all be copied there; there will also be secondary particles. On Thu, 14 Nov 2013, Kyle McCarty wrote: > Hello Takashi, > > I used the 2.2 GeV geometry (which does list a field strength of 0.5 T), > but I did not set anything else. Is there another place I need to manually > specify this? > > Thanks, > > Kyle > > > On Thu, Nov 14, 2013 at 11:36 AM, Maruyama, Takashi > <[log in to unmask]>wrote: > >> To maintain the chicane configuration, the magnetic field strength must >> scale with the beam energy: 1.5 Tesla at 6.6 GeV and 0.5 Tesla at 2.2 GeV. >> Is the field set correctly at 2.2 GeV? >> Takashi >> >> -----Original Message----- >> From: [log in to unmask] [mailto: >> [log in to unmask]] On Behalf Of Kyle McCarty >> Sent: Thursday, November 14, 2013 8:32 AM >> To: hps-software >> Subject: 2.2 GeV Detector Magnetic Field >> >> Hello hps-software, >> >> >> I was performing an analysis on 2.2 GeV data as an extension of the >> analysis I performed for the 6.6 GeV data earlier, and noticed a bit of an >> anomaly. It appears that the beam is angled too strongly toward the >> electron side of the detector. If we consider, say, the background hits >> above 50 MeV, we can see that the center of the beam seems to be nearly to >> the electron edge of the beam hole. >> >> >> These were generated using >> >> >> hps-detectors/detectors/HPS-Proposal2014-v4-2pt2/HPS-Proposal2014-v4-2pt2.lcdd >> >> hps-detectors/detectors/HPS-Proposal2014-v5-2pt2/HPS-Proposal2014-v5-2pt2.lcdd >> >> >> for the V4 and V5 geometries respectively. I used SLIC version 3.1.1 and >> GEANT4 version 9.6.1. >> >> Is this an issue with the magnetic field alignment in the geometry? >> Perhaps the alignment of the beam in the data files? If it is the latter, >> how would I check that? >> >> >> I have attached the plots I generated for the background for reference. >> The naming convention is "CalorimeterHits_XXXX" where XXXX is the energy >> cut applied in MeV. Also, as a comparison, I have attached a 6.6 GeV >> background plot as well. >> >> >> Thanks, >> >> Kyle >> >> >> ________________________________ >> >> >> Use REPLY-ALL to reply to list >> >> To unsubscribe from the HPS-SOFTWARE list, click the following link: >> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 >> >> > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the HPS-SOFTWARE list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1