Welcome

Tom HimelApril 25, 2012

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SLAC National Accelerator Laboratory

Persis S. DrellDirector

April 11, 2011

Sand Hill Road

Fwy 280

SLAC Linac

You are here!

SLAC HEP Focus Moves to Particle Astrophysics

• Fermi Gamma Ray Space Telescope– Joint DOE/NASA project– Launched summer 2008

and providing most detailed look of the gamma ray Universe

• Large Synoptic Survey Telescope– Highest priority ground

based project in 2010 Decadal Survey

– Joint DOE/NSF project– First light 2020(?)

The Reinvention of SLAC

SLAC Accelerators for Particle PhysicsSLAC Accelerators making X-Rays

The New Frontier: Atomic Resolution in Space and Time

• X-ray ‘camera’ with shutter speed of 0.00000000000001 sec (10fs) allows us to:– See atoms and electrons

moving on their natural timescale

– Watch a chemical reaction atom by atom

• Frontier opened in 2009 with ‘ultra-bright’, ‘ultra fast’ x-ray pulses from LCLS here at SLAC

What Could We Do With An ‘Ultra-Fast, Ultra-Bright’ X-ray Source?

• Make movies of chemistry in action– Unlock secrets of photosynthesis and catalysis

• Study the structure and time-resolved function of single molecules e.g. proteins – Drug discovery

• Do 3D imaging and dynamical studies of the bio-world– Understanding of cell function

• Solve the (transient) structure of water and other liquids– Understand this most common and important

liquid• Characterize the transient states of matter

created by radiation, pressure, fields, etc– Control behaviors in extreme environments

where new materials can be created

Inside View: LCLS Undulator Tunnel

• Lasing ‘campaign’ started at 7PM on 4/10/09

• By 10PM, the world’s first x-ray free electron laser was lasing at 1.5 Angstroms!

• First experiments started 10/1/09

XundulatorL1 L2 L3BC1 BC2

RFgun-1

L0

3.5-14 GeV

sector-10 sector-20 sector-24sector-14existing LCLS

enclosure exists at sector 10

und-hallsector-30

L3X

RFgun-2

L1 L2BC1 BC2

L0

Sector-20 wall

3.5-14 GeV e- bypass line3.5-14 GeV

new undulators

LCLS-II: New Injector, Accelerator, & Bypass(Slide souced from P. Emma presentation)

Use 2nd km of SLAC linac (sector 10 to 20) – greater flexibility3-14 GeV energy at 120-Hz beam rate; or 3-7 GeV energy (no SLED) (allows 360-Hz beam rate – not in project)Preserves possibility of up to 28 GeV (and still 1 more km left!)

Recent or planned major EPICS developments

• Fast feedback – 120 Hz multi-IOC, Ethernet links• Archiver – Need million channels, want to reduce care and

feeding (e.g. making new index files and manually setting up many engines)

• PV gateway – Waveforms slow it down. Making new multi-threaded version

• MPS – 1 pulse response at 120 Hz• Linac upgrade – moved LCLS linac control from

Alpha/SLCnet/multibus micro/CAMAC to EPICS/ethernet/IOC/CAMAC.

• microTCA BPM and LLRF– Includes linux with RT patch as IOC OS

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