Alexander Mikhailichenko July 22, 2008

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Presentation transcript:

Alexander Mikhailichenko July 22, 2008 Li Lens Update Alexander Mikhailichenko July 22, 2008 Cornell LEPP, Ithaca, NY 14853

Li LENS BASICS Windows made from BN or Be For given focal distance F, radius a, length L, the current required is For F=1cm, a=0.5cm, L=0.5cm I=166kA

NEW TYPE OF COMMUTATORS FOR HIGH CURRENT

POWER SUPPLY SCHEMATICS BY USAGE OF RDS, THE POWER SUPPLY LOOKS PRETTY GUARANTEED

Li lens can be used with any target: liquid metal (Pb-Bi, Hg) or Ti rim Right after the target located Aluminum made accelerating structure immersed in solenoidal magnetic field. Solenoid wound with Al conductor.

In principle the transformer could be used here also Direct feeding with high current PS looks more progressive

General parameters Lens Energy of primary beam ~150 GeV Undulator period 10-12 mm K factor, 0.4-1 Undulator length 200 m Efficiency , 1.5 Polarization 60% Target W/Ti 1.75 mm/14.8 mm Energy of quanta ~18 MeV Distance to the target* 180 m Lens Feeding current, I <150 kA Field at surface, Hm 43 kG Gradient 62kG/cm Pulsed power ~200kW Average power ~4kW Pulsed duty , <4msec Lens diameter, 2a 1 cm Length, L 0.5-1 cm** Axial pressure, P0 74atm (for L=0.5cm) Temperature gain per pulse 170oC at 150kA