Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 1/7

CLIC_DDS2HPT04.03.2010

V. Khan

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 2/7

DDS2_HPT : Surface fields

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 3/7

DDS2_HPT : RF properties

Max. Values

Esur=220 MV/m∆T = 51 deg.Pin= 70.8Eacc_UL=131 MV/mSc=6.75 W/μm2

RF-beam-eff=23.5%

∆T

35*Sc

Esur

Eacc

Pin

Dashed curves : Unloaded conditionSolid curves: Beam loaded condition

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 4/7

Matching cell design

• Two options• Vary a and b : very small room to vary b vary a and L

L

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 5/7

N=1a: 4-6 mm N=2

a: 4-6 mm

N=3a: 4-6 mm

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 6/7

N=1a: 4.4-4.6 mm N=2

a: 4.4-4.6 mm

N=3a: 4.4-4.6 mm

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 7/7

NextTask Feb Mar Apr May-Jul Sept Oct

onwardsFinalising 9 regular cells

for the 1st str.Done

Matching end cells In progress

HFSS: Full structure(N+2 cells) simulations

To do

Comparison of results (wakefield)in GdfidL Mechanical design &

fabrication (?)Thesis writing-

submission to RMJTo do

Thesis submission to Uni.

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 8/7

Back up slides

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 9/7

)/(E

ESImagSReS 2

2

cell singleacc

ULureacc_struct

61

c mW

Where S= Poynting vector

@ 95 MV/m

Cell # 1

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 10/7

@ 138 MV/m

Cell # 24

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 11/7

DDS2_HPT structureCell Eacc Q R’/Q vg/c Es/Eacc Hsur/Eacc Sc/Eacc2

# (V/m) kΩ/m (%) mA/m W/(x10-4)

1 0.4488 5020 10.179 2.07 2.23 4.9 7.3

2 0.4563 5091 10.649 1.85 2.2 4.82 6.9

5 0.4882 5325 11.723 1.62 2.05 4.5 5.5

9 0.5255 5604 12.899 1.51 1.89 4.15 4.5

13 0.5555 5838 13.952 1.42 1.8 4.0 4.0

17 0.5828 6061 15.049 1.34 1.7 3.75 3.4

21 0.6021 6307 16.416 1.22 1.66 3.5 2.9

23 0.4217 6451 17.411 1.11 1.65 3.3 2.9

24 0.5749 6534 18.130 1.0 1.67 3.3 2.98

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 12/7

Vasim Khan MEW group meeting, Cockcroft Institute 04.03.10 13/7

Cell # 1

Cell # 24