clic_dds2hpt 18.03.2010
DESCRIPTION
CLIC_DDS2HPT 18.03.2010. V. Khan. CLIC_DDSHPT. 24 cells No interleaving. Undamped. Q avg ~1700. Damped. ∆fmin = 62.3 MHz ∆tmax =16.05 ns ∆s = 4.81 m. 24 cells No interleaving. S. Tantawi method. CLIC_DDSHPT Cell#1. │ S22 │ =0.9527 ϕ 22=179.65. N=3. N=2. N=1. Port1. Port2. - PowerPoint PPT PresentationTRANSCRIPT
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 1/6
CLIC_DDS2HPT18.03.2010
V. Khan
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 2/6
24 cellsNo interleaving
24 cellsNo interleaving
∆fmin = 62.3 MHz∆tmax =16.05 ns∆s = 4.81 m
Undamped
Damped
CLIC_DDSHPT
Qavg ~1700
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 3/6
S. Tantawi method│S22│=0.9527 ϕ22=179.65
CLIC_DDSHPT Cell#1
N=1
N=2
N=3
Regular cellMatching cell
Port1 Port2
Port1
Port2 ??
Port2 ??
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 4/6
bg a
Other method
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 5/6
Matching cell #1
ma,mg : 2 micro steps270 simulations
In progressma,mg : 1 μm steps69/165 simulations
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 6/6
Short term goals: Mar-Apr’2010
• Finalise matching cells*
• Surface fields of matching cells*
• 7 single cell simulations for the 192 cell structure with DDS2HPT manifold dimensions
• IPAC
• X-band collaboration meeting
Conference + workshop : May’2010
* priority
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 7/6
NextTask Feb Mar Apr May-Jul Sept Oct
onwards
Finalising 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 RMJ
To do
Thesis submission to Uni.
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 8/6
Back up slides
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 9/6
DDS1 : Plain curve ; DDS2 : Curve with dots
Dipole mode : circuit parameters
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 10/6
DDS2_HPT : Surface fields
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 11/6
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 18.03.10 12/6
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 18.03.10 13/6
N=1a: 4-6 mm N=2
a: 4-6 mm
N=3a: 4-6 mm
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 14/6
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 18.03.10 15/6
NextTask Feb Mar Apr May-Jul Sept Oct
onwards
Finalising 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 RMJ
To do
Thesis submission to Uni.
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 16/6
)/(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 18.03.10 17/6
@ 138 MV/m
Cell # 24
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 18/6
DDS2_HPT structure
Cell 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 18.03.10 19/6
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 20/6
Cell # 1
Cell # 24
Vasim Khan MEW group meeting, Cockcroft Institute 18.03.10 21/6CLIC_DDS_HPT