The new FBCT in the SPS Luciana Kolbeck EDMS 2234336 2 10/07/2019 - - PowerPoint PPT Presentation

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The new FBCT in the SPS Luciana Kolbeck EDMS 2234336 2 10/07/2019 - - PowerPoint PPT Presentation

Aug 29, 2022 350 likes •598 views

The new FBCT in the SPS Luciana Kolbeck EDMS 2234336 2 10/07/2019 Content New location New FBCT Measurement calibrations Other news EDMS 2234336 3 10/07/2019 New FBCT location Why?: Too much radiation from the new

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The new FBCT in the SPS

EDMS 2234336

Luciana Kolbeck

10/07/2019 2

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Content

  • New location
  • New FBCT
  • Measurement calibrations
  • Other news

EDMS 2234336 10/07/2019 3

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New FBCT location

  • Why?: Too much radiation from the new dump
  • New location: BA3 319
  • The old FBCT will stay in BA3 314
  • New device names:
  • Old FBCT: SPS.BCTFR.31450
  • New FBCT: SPS.BCTW.31931
  • Aperture issue: due to misalignment, the FBCT is large

enough (76mm diameter)

EDMS 2234336 10/07/2019 4

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The new FBCT

EDMS 2234336 10/07/2019 5

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The new FBCT

  • Wall-current-transformer (as in the LHC)
  • Less dependence on beam position and

bunch length

  • Digital acquisition

EDMS 2234336 10/07/2019 6

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The new FBCT

  • The wall-current

flows through the 8 screws

  • Transformers

(red) around the screws measure the current

EDMS 2234336

Graphic by M. Krupa

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The new FBCT

EDMS 2234336

Graphic by M. Krupa

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The new FBCT

EDMS 2234336

Picture by M. Krupa

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The new FBCT

  • Digital acquisition (also for transfer-line

FBCTs and old FBCT):

  • Self-phasing
  • Parallel acquired gain ranges, automatic switch
  • Baseline correction

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New measurement calibrations

  • Different calibrations for different beam types
  • Zero-suppression modes: uncaptured beam

and accurate intensity

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New measurement calibrations

  • LHC beam type:
  • baseline correction of 25ns buckets

EDMS 2234336

Graphic by

  • T. Levens

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New measurement calibrations

  • Fixed-target beam type: turn-by-turn

baseline correction

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Graphic by

  • T. Levens
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New measurement calibrations

  • Last run: automatic detection + PPM setting

for calibration factor

  • After LS2: PPM setting for baseline

correction + calibration factor

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New measurement calibrations

  • Zero-suppression modes:
  • One buffer with zero-suppression for accurate

intensity measurement

  • One buffer without zero-suppression to see

uncaptured beam

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New measurement calibrations

 possible to see both acquisitions at the same time  Total intensity is always using the accurate intensity measurement

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New measurement calibrations

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New measurement calibrations

EDMS 2234336

  • FBCT application:

Left menu → calibration

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Other news

EDMS 2234336

  • Transfer-line FBCTs and the old ring FBCT will get

a new digital acquisition system and a new FESA class

  • The transfer-line FBCT and the old ring FBCT are

based on the same system

  • We will have a live acquisition (10Hz) of the FBCT
  • Improved turn-by-turn acquisition
  • FBCT data will be in the QC

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FBCT application

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FBCT application

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FBCT application

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