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CLIC – Decelerator Machine Protection Studies. Lutz Matthias Hein (TE-MPE-PE). CLIC – Complex. Beam Dynamics. FODO – Lattice:. Phase advance (E min ): 90 deg. 1. 2. 3. 875. 876. !! Used to decelerate !!. 2.4 GeV -> 240MeV. Single Kicks. Estimate Limits of Single Quadrupole Offsets.

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Presentation Transcript
clic complex
CLIC – Complex

Lutz Matthias Hein

beam dynamics
Beam Dynamics

FODO – Lattice:

Phase advance (Emin): 90 deg

1

2

3

875

876

!! Used to decelerate !!

2.4 GeV -> 240MeV

Lutz Matthias Hein

single kicks
Single Kicks

Estimate Limits of Single Quadrupole Offsets

Decelerator Nr. 11 (with 876 Quadrupoles):

1

2

3

875

876

Misalign single Quadrupole:

1

2

3

875

876

!! There are differences between focusing and defocusing Quadrupoles !!

(spq ≈ 20µm)

Lutz Matthias Hein

single kicks1
Single Kicks

Step2 – Damage:

When do we „hit“ the aperture causing damage?

Lutz Matthias Hein

multiple kicks
Multiple Kicks

Estimate Limits of Multiple Quadrupole Offsets

Decelerator Nr. 11 (with 876 Quadrupoles):

1

2

3

875

876

Misalign of several Quadrupoles:

  • Quadrupole
  • PETS
  • BPM
  • RF-Kicks

1

2

3

875

876

  • Can we simply add qp-kick up into sequences?
  • Under which circumstances is structural damage espected?

Lutz Matthias Hein

multiple kicks1
Multiple Kicks

Random Seeded Quadrupole Alignment Errors

Inside

Lutz Matthias Hein

multiple kicks2
Multiple Kicks

Random Seeded Quadrupole Alignment Errors

Inside

Lutz Matthias Hein

multiple kicks3
Multiple Kicks

Random Seeded Quadrupole Alignment Errors

Inside

Lutz Matthias Hein

multiple kicks4
Multiple Kicks

Random Seeded Quadrupole Alignment Errors

SAFE

Lutz Matthias Hein

multiple kicks5
Multiple Kicks

Envelope

Intensity: 10.6 · 10-4 nC/µm² -> 0.0

T:\Decelerator\KickStudies\Decelerator11-872m1488PETS\DoubleKicks\RandomRF4\Run2_447EmitFiles.xlsx

Lutz Matthias Hein

upcoming points
Upcoming Points
  • Apply Simple Correction schemes with Intensity Ramping
  • More detailed studies of the loss patterns using manipulated Placet input beams (in progress)
  • Acceptance Estimations
  • Quadrupole field jitter/Errors, e.g. Power Supply trips
  • ....
  • Play Commissioning incl. all errors

Lutz Matthias Hein

slide13

To be continued ...

Lutz Matthias Hein

filamentation speed
Filamentation Speed

Energy and Phase Advance -> ‘speed‘ of the Filamentation

Lutz Matthias Hein

multiple kicks6
Multiple Kicks

Envelope

Intensity: 10.6 · 10-4 nC/µm² -> 0.0

T:\Decelerator\KickStudies\Decelerator11-872m1488PETS\DoubleKicks\RandomRF4\Run2_447EmitFiles.xlsx

Lutz Matthias Hein

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