1. Workshop Overview, Charge and Deliverables Joachim Stöhr

2. 2 LCLS II Strategy LCLS II design is nearly complete  talk by Dave Schultz LCLS II needs to be complemented by instrument suite  will become LUSI II Project talk by John Arthur This workshop is first step toward LUSI II  science drivers  beam parameters  instrumentation priorities

3. 3 LCLS-II is part of long-term LCLS 2025 strategy Slide 3 Workshop focus is on LUSI II: science opportunities enabling capabilities and capacities e.g beam parameters and instrumentation hard x-ray soft x-ray

4. 4 Process and Proposed Timeline for LUSI II Fall 2011: Discussions with DOE-BES  request for white paper by July 13, 2012 March 2012: This workshop  charge and deliverables defined in next slide May 2012: Workshop report July 13, 2012: Delivery of LUSI II white paper to DOE  science, scope, prioritized optics/instruments, cost Fall 2012: DOE Guidance on LUSI II scope and budget, and CD0 document submission  Formation of instrument steering committees  Continued user workshops on instrument development  Goal is LUSI II completion for LCLS II first light in fall of 2018

5. 5 LCLS-II New Instruments Workshops Charge Define LCLS science opportunities created by the enhanced capabilities and capacity of LCLS-II with focus on: 1. biological sciences, 2. materials science, 3. chemical sciences, and 4. atomic, molecular and optical physics. In each of the four identified science areas establish a priority list of desired user experiments including the ability of placing samples in the beam, preparing the desired state of the sample (e.g. by optical, THz methods), synchronizing the transient states with the x-ray pulses and the required detectors for the x-ray and particle signals from the sample. Identify important x-ray beam parameters to address the envisioned science opportunities, such as photons per pulse, pulse length, 120-Hz- based pulse trains, band width and spectral purity, polarization, special requirements in transverse (diffraction limited) and longitudinal (transform limited) coherence... In each of the four identified science areas deliver a workshop report (see next page) that addresses the above questions.

6. 6 Outline of Workshop Reports 1. Executive summary 2. General scientific motivation Importance, e.g. health, energy, technology, environment, basic knowledge Why x-rays, why X-FEL x-rays 3. Specific scientific challenges and envisioned LCLS approach to their solution Discuss ~ 3-5 examples 4. Description of desired x-ray capabilities and instrumentation 5. Priority list of new capabilities/ capacity