Kaon-LT Experiment » History » Revision 2
Revision 1 (Richard Trotta, 05/07/2018 01:38 PM) → Revision 2/175 (Richard Trotta, 05/07/2018 01:39 PM)
{{>toc}} h1. *Notes from Meetings* h2. February 22, 2018 * Discussion of "Andres's":https://redmine.jlab.org/documents/19 slides on elastic W calculation in hcana - initial issue with negative W values seems to be due to outdated information in standard.kinematics file. Additional investigation ongoing. * Brief description of Samip's work - working on coincidence timing decoding with JLab staff and re-optimization of kinematics * Discussion of Richard's slides on run plan kinematics and preparations - ** everyone agrees that in general want to have as many L/T cross section separations as possible in a robust run plan balancing statistics vs. systematics ** before actual run may want to do a 3D optimization in all kinematic variables to get the best possible delta(epsilon) for the L/T separations ** for each setting will need 1-2 shifts for calibrations - need to negotiate with other experiments in run group ** kinematics plots W-Q2 show that still need to do some optimization ** run sheets: include raster size, update coincidence count labeling, and carbon target labeling * Discussion of next meeting. Garth at JLab 8-16 March - might have meeting during that time. * *Action Items:* ** Post slides/notes from this meeting and procedure to set up hcana in Redmine (Tanja) ** Update run sheet and kinematic optimization for W/Q2 (Garth) ** Circulate elastic calculations for kinematic settings (Samip) ** Continue investigation of elastic data and run plan kinematics (Andres/Richard) ** Test software installation instructions (Pete) ** Draft email to JLab management about need for small angle beam pipe - need to have HMS minimum angle of less than 13 degrees for kaon L/T separations (Tanja) h2. March 29, 2018 * Details of adding points to fall run plan - will be ready sooner, likely in week of 4/1 (Garth, Samip, Tanja) * Luminosity scans (Ryan, Andres, "Richard":https://redmine.jlab.org/documents/16, Pete) * Macros, SIDIS analysis (Hem, Anashe) * Elastic data (TBD) h2. April 26, 2018 * Discussion luminosity scan analysis (earlier scan) - "Richard":https://redmine.jlab.org/documents/18 ** Shown is a scaler-based analysis using scalers from report file and from ROOT tree - the values are different, why that is has to be checked ** Notes on efficiencies in report file: *** DT (EDTM) is not electronic deadtime. Instead use for now 50ns* trigger rate for HMS and 100ns* trigger rate for SHMS *** Cherenkov efficiency seems low (check if that is due to PID, thresholds, pi/e, etc) *** Tracking efficiency needs to be checked *** 3/4 trigger efficiency seems ok * Discussion luminosity scan analysis (later scan) - Ryan ** Fewer carbon runs than earlier scan ** Shown is a tracking-based analysis using data from the ROOT trees ** First results for carbon, LH2, and LD2, but efficiencies need to be checked * SIDIS analysis - Hem ** Shown is a data/MC comparison for different kinematic settings. Agreement in shape is very good. Normalization has yet to be applied. ** Discussion about agreement in z and apparent offset - relation of this offset with spectrometer offset * Analysis of exclusive events in SIDIS - Samip ** Shown is a look at the first kaon events in exclusive limit of SIDIS data ** Ongoing work on implementing coincidence time into tree * Discussion of run plan, and in particular possible low Q2/low energy ** Assume that kaon low Q2=0.4 already included - have kinematics with specified beam energies, if needed ** For pion form factor and LT, have two possible settings that can use the prescribed beam energies: Q2=1.45 and 0.35 GeV2 - prioritize towards the higher Q2 as not as sensitive to offsets ** Garth will put this together in a draft email h2. May 10, 2018 h1. BlueJeans Information * Browser: https://bluejeans.com/7578012727 * Bluejeans app (https://www.bluejeans.com/downloads): "Join A Meeting" with Meeting ID: 7578012727 (no pass code required) * Phone: 1-888-240-2560 (other numbers: http://bluejeans.com/numbers) ** Participant code is 7578012727# Kaon-LT Experiment