# Presentation: 100117

## Brief Update on the Linac Coherent Light Source - LCLS

**Keith O. Hodgson**
**SSRL Director**

**Brief Update on the Linac Coherent Light Source - LCLS**

**February 26, 2002**
*** ***

***Basic Energy Sciences Advisory Committee***

***Undulator Prototype***

***SASE Physics and Simulations ***

## LCLS -  a new facility engaging a broad range of experience and capabilities drawn from the synchrotron, laser and high energy physics communities providing x-ray photons with extraordinary properties

**LLNL**

***UCLA***

***LCLS****** -  a new facility engaging a broad range of experience and capabilities drawn from the synchrotron, laser and high energy physics communities providing x-ray photons with extraordinary properties***

***LCLS Project - Major Collaborators***

## April, 2001	John Galayda joins SSRL/SLAC as Project Director

**April, 2001****	****John Galayda joins SSRL/SLAC as Project Director**
**June, 2001****	****CD0 (Statement of Mission Need) Approved by DOE**
**Fall, 2001****	****Technical Progress on Photocathode Gun **
**January, 2002****	****DOE Guidance on Scope and Schedule**
**February, 2002****	****President’s FY2003 Budget Includes LCLS PED ****	****	****	****Funding**
**February, 2002****	****LCLS Science Advisory Committee Meets and ****	****	****	****Formulates Strategy for Framework of Experimental ****	****	****Program Development**
**April, 2002****	****DOE Lehman Project Review (4/23-25) **

## Recent Technical Progress on Photocathode Gun

**A prime determinant of output power in                                                         X-FELs is performance of photocathode guns**
**Gun Test Facility (GTF) at SSRL has demonstrated performance consistent with 0.6 ********m slice emittance at 0.2 nC**
**Computer models predict that the GTF gun, providing this same beam to the LCLS, will produce a 140 fsec, 3-4 GW pulse at 1.5 Angstrom**
**A good option for commissioning the LCLS with low charge and “moderate” power **(LCLS design goal is 9 GW)

## DOE Guidance on Scope and Schedule

**Scope now being developed for LCLS includes the facilities necessary to characterize the LCLS beam and test the ability to:**
**filter**
**focus**
**synchronize with a pump laser**
**split/delay the x-ray beam for pump/probe experiments**
**monochromatize**

**At 1/02 meeting of DOE-BES and SSRL/LCLS management  - guidance provided on construction project scope that explicit scientific instruments would not be included**

**Approach enables more accurate definition of cost (experiments are more than 5 years away), of performance metrics for completion of construction project , and for flexibility in defining and funding the science program**

**Leads to developing new strategy for LCLS experimental program and role of LCLS Science Advisory Committee (SAC)**

## LCLS Project Schedule 

***LCLS Project Schedule ***

***Schedule includes 2 years of project engineering and design (PED) prior to 3 years of construction, leading to operation in Fall, 2007***

## PED funding proposed in FY2003 President’s Budget would begin work on engineering and detailed design

- With design about 30% complete, and successful validation and authorization from DOE construction review management, next step will be construction
- TEC range $165M-$225M

## Experimental Science Program for LCLS and the LCLS   Scientific Advisory Committee

***Experimental Science Program for LCLS and the LCLS ******  Scientific Advisory Committee***

**SAC strongly endorsed principle of open, peer-reviewed access and competition based on science for decision making and operation in a general user (not a PRT or CAT) model where SSRL coordinates activity (peer review) and technical management/general operation for scientific teams**

**LCLS SAC will be reformulated as external advisory and oversight committee to consider proposals for LCLS instruments and science **

**New SAC is being chaired by Prof. R. Falcone of UC Berkeley **

**At last meeting of current SAC (2/8/02), framework began to be formulated for experimental program approach**

##  Summary

**The LCLS will be a source of unprecedented brightness and coherence, delivered in sub-picosecond pulses**
**It is the most cost and time effective route to a hard x-ray free electron laser facility**
**It is based on technology and know-how available at the collaborating institutions**
**Takes advantage of the availability of the SLAC linac**
**Builds on activities of DOE laboratories and universities in next generation R&D and laser physics and science **
**R&D activities coordinate well with efforts in Europe and plans for future XFEL facility at DESY**
**Will be an extraordinary new scientific tool in 2007 and beyond**

*For further information please contact:*
- Keith Hodgson, SSRL Director		John Galayda, LCLS Project Director
- Hodgson@SSRL.SLAC.Stanford.Edu	Galayda@SLAC.Stanford.Edu
- Ph:  650 926-3153  Fx:  650 926-4100	Ph:  650 926-2371  Fx:  650 926-4100