LHC 4.8 GHz Schottky Commissioning Ralph J. Pasquinelli Andreas - - PowerPoint PPT Presentation

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LHC 4.8 GHz Schottky Commissioning Ralph J. Pasquinelli Andreas - - PowerPoint PPT Presentation

Nov 18, 2023 459 likes •701 views

LHC 4.8 GHz Schottky Commissioning Ralph J. Pasquinelli Andreas Jansson April 8-15, 2010 Typical GUI Hardware Page R. J. Pasquinelli CCC R. J. Pasquinelli Service Building Point 4 R. J. Pasquinelli Calibration signal generator with 10

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LHC 4.8 GHz Schottky Commissioning

Ralph J. Pasquinelli Andreas Jansson April 8-15, 2010

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  • R. J. Pasquinelli

Typical GUI Hardware Page

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CCC

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Service Building Point 4

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Calibration signal generator with 10 MHz ext ref from Beam 1 Tracking RF frequency change

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Beam 2 cal signals to 21.4 MHz IF Sidebands are line harmonics on sig gen Vertical higher IL due to 7/8” cable plant Horizontal Vertical

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2x2 store 3.5 TeV

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Un-gated base band signals 2x2 store NOTE LO frequencies set for revolution Frequency of 11245 Hz

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HB2 21.4 MHz IF with arbitrary 378 MHz LO

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Synchrotron f @ 3.5 TeV Freq=23 Hz HB1 21.4 MHz IF

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Gate on full time blue Gate Table green SA noise floor black Max noise reduction with gating observed to be approximately 10 dB HB1 21.4 MHz IF

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Debugging Gates using Tunnel Scope Bouncing (yellow) was a software error Scope is essential for gating studies

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Bunch loading table for 2x2 store

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Baseband 2x 2 store 3.5 TeV with

  • gating. Vertical Band 1 has modified

daughter card which looks good. Need to modify others.

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Zoom in on sideband with FNAL GUI

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Signal to Noise Limitations with Gating HB1 Comparison of 21.4 MHz to Baseband

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Dedicated 10 bunch store 450 GeV

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10 bunches approximately 1011 total

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Beam 2: 10 Bunch store 450 GeV Vertical gate settings

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First Schottky Signals FNAL GUI app 10 Bunches Beam 2: 450 GeV

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First Schottky Signals 10 Bunches Beam 2: 450 GeV with averaging Measured Accurate Tunes

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