1 / 5

LCLS-II Undulator Installation Sequence and Expansion

LCLS-II Undulator Installation Sequence and Expansion. M. Rowen 1-18-2012. Goals. Goal Installation Plans: Expansion planning is to minimize changes as undulator segments and seeding mono’s are planned. 1) Keep source point fixed. 2) Keep mono position fixed, once installed.

kevlyn
Download Presentation

LCLS-II Undulator Installation Sequence and Expansion

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. LCLS-II Undulator Installation Sequence and Expansion M. Rowen 1-18-2012 LCLS-II Und. Installation & Expansion, 1-18-12

  2. Goals • Goal Installation Plans: • Expansion planning is to minimize changes as undulator segments and seeding mono’s are planned. • 1) Keep source point fixed. • 2) Keep mono position fixed, once installed. • HXR line the source should be as far from the end stations as possible to get maximum defocused spot. • SXR line the source should be down stream as far as possible to limit over filling of mirrors at low energies. • This does increase power density on absorbers. • If branch lines have limited energy ranges, i.e. low energy and high energy branches, then mirror angles on low energy line can be increased reducing the over filling and the source can be further away. • Two Cases: 198 & 255m undulators. LCLS-II Und. Installation & Expansion, 1-18-12

  3. HXU Expansion Plan SASE in Longer Tunnel: CD-1 Scope, SASE: Drift 8.8m 20% 1-6 26.4m 20% 1-6 26.4m Base Und. Seg. 7-32 114.4m Base Und. Seg. 7-32 114.4m Drift 57.2m Drift 105.6m 8.8 26.4 35.2 0 140.8 149.6 255.2 198.0 0 Source Point 99-130 Source Point 108-139 TW Taper to 8keV, No Contingency, in CD-1 Tunnel: Drift 4.4m Seed Und. Seg. 1-7 30.8m Tapered Und. Seg. 8-41 149.6m Drift 8.8m 193.6 8.8 0 39.6 44.0 198.0 Source Point 83-130 Mono 4.4m Mono 4.4m TW Taper to 13keV, No Contingency, In Longer Tunnel: Seed Und. Seg. 1-11 48.4m Tapered Und. Seg. 12-57 202.4m 0 48.4 52.8 255.2 Source Point 92-138 LCLS-II Und. Installation & Expansion, 1-18-12

  4. SXU Expansion Plan CD-1 Scope, SASE: Drift 13.2m Drift 105.6m 20% 1-4 17.6m Base Und. Seg. 5-18 61.6m 184.4 0 105.6 123.2 198.0 SASE in Longer Tunnel: 350 GW Taper to 1keV, No Contingency, in CD-1 Tunnel: Source Point 153-175m Seed Und. Seg. 1-9 39.6m Drift 88.0m Drift 162.8m Tapered Und. Seg. 10-24 61.6m 88.0 0 0 198.0 255.2 127.6 136.4 Source Point 1 keV, ~161m 20% 1-4 17.6m Base Und. Seg. 5-18 61.6m Drift 13.2m Mono 8.8m Mono 8.8m 242.0 162.8 180.4 Source Point 210-233m 350 GW Taper to 1keV, No Contingency, In Longer Tunnel: Tapered Und. Seg. 10-24 61.6m Drift 145.2m Seed Und. Seg. 1-9 39.6m 184.8 193.6 145.2 0 255.2 Source Point 1 keV, ~218m LCLS-II Und. Installation & Expansion, 1-18-12

  5. Assumption and Conclusions • Assumptions: • Post saturation taper the source point is ~1/2 distance from saturation point to end undulator. • For strong taper Juhao provided more exact estimate for 8,10 and 18 keV. (Assumed observation point was 150m from end HXR undulator & 110m end SXR.) • Extrapolated strong taper stodate.ource point to 4keV. • Only 1 point for SXR at 1keV • Conclusions: • The HXR undulators should be pushed to the upstream end of the tunnel. • The SXR undulator should be pushed to the downstream end of the tunnel. • This will have implications on spacing and number service buildings. LCLS-II Und. Installation & Expansion, 1-18-12

More Related