Muon Unscripted Testing: ALC

Introduction

These tests looks at the ALC interface. This interface loads a series of runs and automatically calculate the asymmetry. The asymmetry calculation is determined by the settings on the load page and are for a pair. It is often used to find peaks in the asymmetry as a function of a sample log (e.g. temperature).

ALC peak fitting

Time required 10 - 15 minutes

  • Open ALC (Interfaces > Muon > ALC)

  • Change Instrument to EMU

  • In the loading bar enter 81061-142

  • The text undearneath will change colour while it searches for the data (orange)

  • Once it has found the data the text will turn green

  • Select field_danfysik for the sample log

  • Set the calculation max to 16

  • Press the Load button, this can be slow

  • Once it is complete a plot will appear showing one dominant peak

  • Press the Baseline modelling button at the bottom of the interface

  • Add a LinearBackground fitting function

  • Add a section, drag the upper bound to be just before the start of the main peak

  • Add a second section, type into the Start X box to place it after the main peak

  • Press fit

  • Click the Corrected data tab and the baseline should be about zero

  • Press the Peak fitting button at the bottom of the interface

  • Add a Gaussian fitting function, set the parameters to give a decent guess (use plot guess to check)

  • Press fit, you should then have a nice fit to the data

ALC MultiPeriod Data

Time required 5 minutes

  • In the loading bar enter 81070-81095,81120-40

  • Select field_danfysik for the sample log

  • Press the Period info button and pop up will appear with 2 rows

  • Untick subtract in the periods section

  • Set the calculation max to 5

  • Press the Load button, this can be slow

  • The new data will look a mess

  • Press the External Plot button at the bottom, a new plot will appear

ALC Single Period Data

Time required 5 minutes

  • Change Instrument to HIFI

  • In the loading bar enter 134028-39

  • Select run_number for the sample log

  • Press the Period info button and pop up will appear with 1 row

  • Change the dead time correction to be From Data File

  • The subtract checkbox should be disabled

  • Set the calculation max to 15

  • Press the Load button, this can be slow

  • The new data will look like a decay, with a max value just below 0.2

  • In the Grouping section change the Alpha to be 1.3

  • Press the Load button

  • The new data will look like a decay, with a max value just below 0.07

  • In the Grouping section change it to Custom

  • For Forward and Backward give some valid detectors (e.g. 1, 64)

  • Press Load and the data will change

  • Check that invalid detector values (i.e. letters, decimals) result in a warning when pressing Load