1 / 7

MOM report

MOM report. Jean-Sebastien Graulich, Geneva. Last Week Run Plan for this Week Machine Physics. Last week (1). Online Optimization Some data taken but mainly code development Came to some conclusions: Need “Online” Simulation Need to asses beam line alignment

claire
Download Presentation

MOM report

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MOM report Jean-Sebastien Graulich, Geneva • Last Week • Run Plan for this Week • Machine Physics J.S. Graulich

  2. Last week (1) • Online Optimization • Some data taken but mainly code development • Came to some conclusions: • Need “Online” Simulation • Need to asses beam line alignment • Need access to Beam Line Settings (now entered manually at start of run) • Not from CDB (available only at the end of run) • Not from EPICS (complicate software dependence scheme) • => From data stream (nearly there, need unpacking) J.S. Graulich

  3. Last week (2) • Neutral study • We do observe neutrals causing Triggers in TOF1 • Even if all magnets are Off ! (DS at 100 Amp) • Only when we dip the target ! • Scales with beam loss • About 7 triggers per spill at 2V beam loss 3.2 ms spill 2V ISIS beam loss = ~ 1300 mV in target DAQ • Only when the beam blocker is open ! • About 40% of the triggers in negative polarities are caused by neutrals • Irreducible • Main source of reconstruction inefficiency • Still need TOF efficiency studies J.S. Graulich

  4. Last week (3) • ISIS is tired • No beam on Thursday • Very little on Friday • Unstable on Sunday • Target delay scan • A few data acquired (4-5 points at 2V BL) • Rob Fletcher is doing the analysis J.S. Graulich

  5. CDB in Use • We can now reload the magnet configuration from a previous run by a single click ! • That really helps • Many Thanks to David Forrest and James Leaver • Now also available with tags • ReferenceRun (6+200 M0) • EndOfShift (all Conventional Magnets at 0A; DS at 400 A) • PionScan (200 MeV/c pions, Q789 at 0A) • Please use CDB offline as well • Important Note: • All variables not available through EPICS are set to zero Use spread sheet for the time being J.S. Graulich

  6. This week • Alignment studies (Chris Rogers) • Pion Beam at 240 MeV • Narrower momentum distribution • Higher statistics • Q789 OFF • Straight lines between TOF0 and TOF1 • Not a strong effect on trigger rate • DS at 100 Amp (call it “Collimator Mode”) • Narrower momentum distribution • Scan D1, D2, and the Quads • If ISIS allows J.S. Graulich

  7. Machine Physics • Saturday August the 14th • MOM = Roumen Tsenov • From 16h30 to 24:00 • Start with ISIS at 50 Hz • scan target Delay at 3 V beam loss (1 hour) • Redo Adam Dobbs’ study with positive • Up to 10 V Beam Loss • Arrange for radiation measurement in MICE target area soon after the run J.S. Graulich

More Related