friday meeting
DESCRIPTION
Friday meeting. Nawin Juntong Halloween-2008. ICHIRO. RE-ENTRANT. TESLA. ECHO 2D and ABCI comparison. ECHO 2D mesh= σ z /5, ABCI mesh= σ z /10,. Values from papers for TESLA structure. TTF-Style Coupler. Non identical cells. 9 cells run. 4.5 cells run. Upstream. Downstream. - PowerPoint PPT PresentationTRANSCRIPT
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