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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.
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CLIC_DDS2HPT 18.03.2010 V. Khan
CLIC_DDSHPT 24 cells No interleaving Undamped Qavg ~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 ϕ22=179.65 N=3 N=2 N=1 Port1 Port2 Port2 ?? Port1 Matching cell Port2 ?? Regular cell
Other method b g a
Matching cell #1 ma,mg : 2 micro steps 270 simulations In progress ma,mg : 1 μm steps 69/165 simulations
Short term goals: Mar-Apr’2010 * priority • Finalise matching cells* • Surface fields of matching cells* • 7 single cell simulations for the 192 cell structure with DDS2HPT manifold dimensions Conference + workshop : May’2010 • IPAC • X-band collaboration meeting
Dipole mode : circuit parameters DDS1 : Plain curve ; DDS2 : Curve with dots
DDS2_HPT : RF properties Esur Max. Values Esur=220 MV/m ∆T = 51 deg. Pin= 70.8 Eacc_UL=131 MV/m Sc=6.75 W/μm2 RF-beam-eff=23.5% 35*Sc Eacc Pin ∆T Dashed curves : Unloaded condition Solid curves: Beam loaded condition
Matching cell design L • Two options • Vary a and b : very small room to vary b • vary a and L
N=1 a: 4-6 mm N=2 a: 4-6 mm N=3 a: 4-6 mm
N=1 a: 4.4-4.6 mm N=2 a: 4.4-4.6 mm N=3 a: 4.4-4.6 mm
Cell # 1 Where S= Poynting vector @ 95 MV/m
Cell # 24 @ 138 MV/m
Cell # 24 Cell # 1