Muon Collider Design Summary Y. Alexahin (FNAL APC) MAP 2014 Spring - - PowerPoint PPT Presentation

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Muon Collider Design Summary Y. Alexahin (FNAL APC) MAP 2014 Spring - - PowerPoint PPT Presentation

Muon Collider Design Summary Y. Alexahin (FNAL APC) MAP 2014 Spring Meeting, Fermilab, May 27-31, 2014 2 3 TeV c.o.m. Muon Collider -tuning section CCS IR ( ) m 350 x , y D ( m ) 300 x 250


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SLIDE 1

Muon Collider Design Summary

MAP 2014 Spring Meeting, Fermilab, May 27-31, 2014

  • Y. Alexahin (FNAL APC)
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SLIDE 2

2

Collider Ring Summary- Y. Alexahin, MAP14 meeting, FNAL 05/31/2014

  • Interaction Region (IR) designed with quadruplet FF

which promises better detector protection from secondaries

  • βy

(max) is reduced to 80km compared to 118km in the

design with triplet FF

  • Maximum quadrupole aperture is reduced from 18cm

to 15cm (while maximum pole tip field increased to 12T)

  • Dynamic Aperture did not suffer despite βx increase

in sextupoles of Chromaticity Correction Section (CCS)

3 TeV c.o.m. Muon Collider

100 200 300 400 50 100 150 200 250 300 350

) ( ) (

,

m D m

x y x

β

x

β

y

β ) (m s 15 ×

x

D

IR CCS β-tuning section

200 400 600 800 1000 200 400 600 800 1000

γ Ay

2(µm)

γ Ax

2(µm)

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SLIDE 3

Muon Collider Design Effort @ SLAC

3

Collider Ring Summary- Y. Alexahin, MAP14 meeting, FNAL 05/31/2014

  • M.-H. Wang, Y. Nosochkov and Y. Cai joined the effort
  • A futuristic 3TeV design with doublet FF was presented employing 20T dipoles and

quadrupoles with 15T pole tip to reduce circumference to 2.77km compared to 4.5km for the quadruplet-based lattice with 10T dipoles

  • Chromaticity Correction based on two –I sextupole pairs was used instead of 3

sextupole scheme developed at FNAL to increase vertical Dynamic Aperture. This hope did not materialize thus far (may be by a different reason)

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SLIDE 4

Coherent Effects @ Higgs Factory (A. Burov)

4

Collider Ring Summary- Y. Alexahin, MAP14 meeting, FNAL 05/31/2014

  • Coherent instabilities (both resistive wall and geometric impedance driven) do not

present danger due to long rise-time compared to muon lifetime

  • Special measures should be taken to mitigate the potential well distortion
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SLIDE 5

Plans (downscaled)

5

Collider Ring Summary- Y. Alexahin, MAP14 meeting, FNAL 05/31/2014

  • Finish of the 3TeV MC lattice with quadruplet FF (will be done no matter what

by the end of July)

  • Study tolerances on field errors and misalignments – very important for

understanding the real constraints on beta-functions, momentum compaction factor etc. (will be done only if authorized)

  • First look at 6TeV lattice (?)

All other issues can wait