Friday meetingNawin Juntong

Halloween-2008

σz = 1 mm σz = 0.7 mm σz = 0.3 mm

ECHO 2D

ABCIΔ

(%)ECHO

2DABCI Δ (%)

ECHO 2D

ABCIΔ

(%)

TESLAkL [V/pC] 9.89 10.04 1.52 11.56 11.82 2.25 17.72 18.46 4.18

kT [V/pC/m] 18.36 18.52 0.87 15.41 15.61 1.30 10.38 10.57 1.83

ICHIROkL [V/pC] 12.89 13.03 1.09 15.32 15.57 1.63 25.19 25.77 2.30

kT [V/pC/m] 28.14 28.26 0.43 23.94 24.06 0.50 17.03 17.12 0.53

RE-ENTRANT

kL [V/pC] 11.01 11.15 1.27 13.08 13.34 1.99 21.25 21.91 3.11

kT [V/pC/m] 21.17 21.30 0.61 17.96 18.14 1.00 12.70 12.85 1.18

ECHO 2D and ABCI comparison

TESLA – CDR (σz = 0.7mm)

Longitudinal loss factor (kL) 10.2 V/pC

Transverse loss factor (kT) 15.1 V/pC/m

TTF – DR (σz = 1mm)

HOM loss factor (kL) 9.24 V/pC

Values from papers for TESLA structure

ICHIRO RE-ENTRANTTESLA

ECHO 2D mesh= σz /5, ABCI mesh= σz /10,

TTF-Style Coupler

Mesh(cells)

G.Burt G.Burt modified G.Hoffstaetter G.Hoffstaetter use scale B

462672 59.58-815.16i -- 122.28+768.95i 115.99+738.71i

682560 71.67-786.19i -- 138.37+733.07i 130.24+707.57i

987280 22.74-606.98i -- 32.61+577.22i 32.71+575.49i

1403649 42.07-212.97i 69.84+178.68i 70.72+178.34i 67.12+167.71i

Infinite 21.53-110.34i -- 19.73+84.54i 19.74+91.03i

9 cells run

Mesh(cells)

G.Burt G.Burt modified G.Hoffstaetter G.Hoffstaetter use scale B

352080 18.21-737.33i -- 78.74+699.26i 73.99+674.38i

510860 31.46-600.53i -- 36.65+573.44i 36.03+572.98i

725400 25.40-210.92i -- 52.21+180.14i 49.44+179.38i

969306 23.41-167.22i 47.00+137.05i 47.41+136.91i 45.49+128.91i

1194160 27.20-209.92i -- 47.61+136.51i 46.99+210.04i

Infinite 29.42+112.34i -- 26.83-4.66i 36.38+33.98i

4.5 cells run

Non identical cells

RF Coupler kick comparison

kx Upstream Downstream Only Power CP

My results -- -- 19.74+91.03i

I. Zagorodnov1 -57.1+6.6i -25+51.5i --

V.Yakovlev2 -68.8+3.7i -36.5+66.1i 35.6+76.5i

M. Dohlus3 -57+7i -23+52i 34.3+55.7i2

N. Solyak4 -68.8+3.7i -36.5+66.1i --

Upstream Downstream

1 ILC Workshop, DESY, May 2007.

2 Wakefest07,RF coupler kick.

3 MOPP013, EPAC08.

4 MOPP042, EPAC08.

dzEqcpLz

zzz

0

dzcBEqcpLz

zyxx

0)(

Lz

zz

Lz

zyx

dzE

dzcBE

z

xkx cp

cpk

0

0)(

)(

)()ˆˆ( kc

zizPEzPMz eEiEE

couplerzPM

couplerzPE

xE

xE

)(ˆ

)(ˆ

)()ˆˆ( kc

zixPExPMx eEiEE

)(0 )ˆˆ( kc

ziyPMyPEy eHiHB

kx is constant when vary the phase Φk

HOM included simulation

-Extract HOM geometry from Slava’s sat file in HFSS into new separated sat file for each part.

-Import new sat files into MWS.

-Tested simulation run with 20 lines/wavelength meshing in eigenmode solution.

TDR(Z. Li @wakefest2007)

NAWIN(MWS drawing by N. Juntong)

NEXT• Obtain the rf-kick results from the simulation on fundamental mode

and HOM couplers with MWS.• Attend CAS2008 at Frascati, Italy on 2-14 November 2008.

BACK UP Slides

dzEqcpLz

zzz

0dzcBEqcp

Lz

zyxx

0)(

Lz

zz

Lz

zyx

dzE

dzcBE

z

xkx cp

cpk

0

0)(

)(

1.Combine 2 SW fields to get TW fields

2.Integrate Lorentz force to get the change of momentum

3.Transverse kick factor is a ratio of the change of transverse momentum to the change of longitudinal momentum

How to calculate kick factor (Dr. G.Burt method)

minimumor maximum makes

minimumor maximum makes

)(

)))(())((()(

2

1

1

21

221

cp

cp

cp

icpcpcpk

x

z

z

xxxx

zPMzPEz EEE xPMxPEx EEE )(0 yPMyPEy HHB

)cos(ˆ1 kzPEzPE c

zrEE

)sin(ˆ2 kzPMzPM c

zrEE

)cos(ˆ1 kxPExPE c

zrEE

)sin(ˆ2 kxPMxPM c

zrEE

)sin(ˆ1 kyPEyPE c

zrHH

)cos(ˆ2 kyPMyPM c

zrHH

couplerzPE

couplerzPM

xE

xE -r

r

)(ˆ

)(ˆ

,1

2

1

PEC bc. PMC bc. MWS from fields theis A

dzEqcpLz

zzz

0dzcBEqcp

Lz

zyxx

0)(

Lz

zz

Lz

zyx

dzE

dzcBE

z

xkx cp

cpk

0

0)(

)(

1.Combine 2 SW fields to get TW fields

2.Integrate Lorentz force to get the change of momentum

3.Transverse kick factor is a ratio of the change of transverse momentum to the change of longitudinal momentum

How to calculate kick factor (B. Buckley and G.H. Hoffstaetter method)

)()ˆˆ( kc

zizPEzPMz eEiEE

couplerzPM

couplerzPE

xE

xE

)(ˆ

)(ˆ

MWS from fields theis A

PRST-AB 10,111002(2007),Cornell-ERL-06-02

)()ˆˆ( kc

zixPExPMx eEiEE

)(0 )ˆˆ( kc

ziyPMyPEy eHiHB

TESLA-TTF beam pipe cavityTESLA 2001-33

TESLA – CDR (σz = 0.7mm)

Longitudinal loss factor (kL) 10.2 V/pC

Transverse loss factor (kT) 15.1 V/pC/m

TTF – DR (σz = 1mm)

HOM loss factor (kL) 9.24 V/pC

Parametersσz = 1 mm σz = 0.7 mm σz = 0.3 mm

ECHO 2D ABCI ECHO 2D ABCI ECHO 2D ABCI

Longitudinal loss factor (kL) [V/pC] 9.89 10.04 11.56 11.82 17.72 18.46

Transverse loss factor (kT) [V/pC/m] 18.36 18.52 15.41 15.61 10.38 10.57