1 / 6

LINAC4 transfer line – optics

LINAC4 transfer line – optics. L4. L2. PSB. Optics Layout Tunability Safety margins. ↕ 2.5m. LINAC4 transfer lines : 177.31 m (from PIMS out to foil); 69.83 m new line,then join at BHZ20 the present Linac2 line (107.48 meters from BHZ20 to foil).

bazyli
Download Presentation

LINAC4 transfer line – optics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LINAC4 transfer line – optics L4 L2 PSB • Optics • Layout • Tunability • Safety margins ↕ 2.5m LINAC4 transfer lines : 177.31 m (from PIMS out to foil); 69.83 m new line,then join at BHZ20 the present Linac2 line (107.48 meters from BHZ20 to foil). Active elements : 4+2bendings;16+18 quads,11+11 steerers and 1 RF cavity. M. Eshraqi, L. Hein, A. Lombardi (BE-ABP)

  2. Optics-layout. • Uncompensated longitudinal space charge forces, • Dispersion and space charge • X-Y coupling • Bottlenecks : RF cavity; septum , distributor • Match the six conditions at the PB (disp=0;dis-1.4;various beta) • Contain the emittance increase (30% at max, can be reduced) • Accept energy swing of 1.2 MeV • At foil: 65mA in 0.3-0.4 pi(rms mm mrad norm) ΔE= 100-150 keV rms W A L L

  3. Optics and tunability X,y rms Ratio aperture/rms above 6 everywhere

  4. Errors and Correctors • Static alignment errors can be corrected with steerers • Jitter in the bending power supplies should be kept below 10-4 • Jitter in linac energy is important for DIS and SEP acceptance

  5. AT DIS, beam size-all cases. • In 4 rms there is more than 90% of the beam • Effect of energy painting is of the order of 5-10 mm (not included in the plot). D=1.4 D=0 vertical aperture might be the limit for tunability in the case D=0 , unless we change yc=5.19 mm

  6. At SMV, all cases, beam size. OK

More Related