DELTA Project Overview

Heinz-Dieter Nuhn – LCLS Undulator Group Leader

Presented atLCLS-II Physics Meeting

Tuesday, October 11, 2011

Helical Undulator R&D (DELTA)

Existing Girder (U33)Existing Girder (U33)

SupportSupport SupportSupport

DriverDriver DriverDriver

Controls &

Software

Controls &

Software

Vacuum chamber

Helical undulator to enhance taper and to provide circularly polarized (soft) x-raysCornell’s Delta undulator is a novel, compact design that fits straightforwardly onto existing LCLS girderPlan to build and test a 3.2-m Delta @ U33

Cornel Delta undulator (A. Temnykh)

Variable Phase Undulators

Four independent quadrants of permanent magnets move longitudinally at fixed gap.

By sliding the arrays it is possible to control the K value over full range and

to control the polarization of the radiation emitted

Soft X-Ray Polarization ControlPage 3

4 MovablePM Quadrants

DELTA Project Synopsis

Conceptual Design is in preparation

Gene Kraft the Project Engineer

Sasha Temnykh will provide technical support

Rough cost estimate: $1.5M

Rough schedule estimate: 2 years

DELTA is Part of LCLS Short to Mid Term Expansions

25 Regular LCLS Und. 8 SHABs

A: Present

4 SHABs15 Regular LCLS Und. 13 Regular LCLS UndHXRSSB: Scheduled for Jan 2012

DELTA

7 Reg Und

HXRSSE: Add SXR Self Seeding

HXRSSF: Expand (after 2015)

DELTA

15 Regular LCLS Und.

HXRSSC: Option after Jan 2013 to support stronger tapering 4 Regular + 13 Weaker Und

4 Regular + 12 Weaker Und

4 Regular + 17 Weaker Und

15 Regular LCLS Und.

HXRSSD: Proposed R&D (after 2013) DELTA

4 Regular + 12 Weaker Und

7 Reg Und

SXRSS

7 Reg Und 7 Reg Und

SXRSS

Higher Brightness at 8 keV

Increased Intensity

Polarization Control

Higher SXR Brightness

120 GW FEL

Sash Temnikh will now talk about the DELTA undulator =>

End of Presentation