Richard M. Bionta XTOD [email protected] October 12, 2004 UCRL-PRES-XXXXX X Ray Transport, Optics, and Diagnostics, Overview Facility Advisory Committee

Richard M. Bionta

XTOD Overview [email protected]

October 12, 2004UCRL-PRES-XXXXX

X Ray Transport, Optics, and Diagnostics, Overview

Facility Advisory Committee Meeting

October 12-13, 2004

This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract No. W-7405-Eng-48.

Richard M. Bionta



Outline

Overall Scope

General Goals

Technical Highlights

Risks

Plans including the Continuing Resolution

Conclusions

Richard M. Bionta



XTOD Transports Photons from e- Dump to FEH

UndulatorHall

Electron Dump

Front End Enclosure

Near Experimental

Hall

X-Ray Tunnel

Far Experimental

HallElectron Transport

Linac

Richard M. Bionta



Fastclosevalve

Slit A

Muonshield

Gas Attenuator

SolidAttenuator

Slit B

PPS

Muonshield

Direct ImagerIndirect Imager

Comissioning:Spectrometer,Total Energy

PPS

ElectronBeam

PhotonBeam

Electron Dump

Front End Enclosure

NEH1.5 Scope: Front End Enclosure/ Near

Experimental Hall

Flipper Mirror

Richard M. Bionta



Flipper Mirror

X-Ray Beam Transport

Pulse Split and Delay

Far Hall Direct Imager and Tank

System Monochrometer

FEH

Tunnel

NEH

1.5 Scope: NEH, Tunnel, FEH

Richard M. Bionta



XTOD Goals

Provide vacuum path from end of undulator to hutches in Far Hall with capability of attenuating beam to synchrotron levels.

Provide necessary diagnostics to commission the LCLS and monitor its performance.

Detect X-Ray Photons in Far Hall.

Demonstrate detection and optical techniques that would be useful to users.

Richard M. Bionta



Main Imaging Diagnostic: Scintillator/Microscope

AdvantagesAdjustable resolution to 1 m.

X-Ray sensor decoupled from CCD

DisadvantagePlaced directly in beam

CCDCamera

MicroscopeObjective

LSO or YAG:Ce crystal prism assembly

X-ray beam

Richard M. Bionta



Direct Imager(Placed directly in

beam)

Indirect Imager

(Sees only a low intensity reflection)

Turbo pump

BeIsolation

valve

Indirect Imager sees low intensity reflection

Richard M. Bionta



Gas and Solids Provide Attenuation

Autocad

Gas AttenuatorSolidAttenuator

Use Gas

Use Solids

* For a transmission of 10-4

Richard M. Bionta



XTOD Risks

Technical risks listed in registry include attenuator performance and instrument backgrounds (mitigated by modularity, redundancy and placement)

Funding profile requires significant design and even conceptual design efforts required when funding commences (CR may help)

Designs and concepts based on theoretical calculations of beam characteristics (current work)

Richard M. Bionta



2-3 mJ FEL

20 mJ Spontaneous

3 mJ High energy core E > 400 keV

Detailed modeling will continue to be our major near term effort

At entrance to NEH, FEL tuned to 8261 eV Fundamental

Expected LCLS beam profile contains FEL and Spontaneous halo

Richard M. Bionta



Spontaneous halo has rich spectral and spatial structure

0 < E < 10 keV 7.6 < E < 9.0 keV 10 < E < 20 keV 20 < E < 27 keV

20 mm

20 m

m

Near-Field Spontaneous Radiation Patterns in FEE, at position of gas attenuator (88 m from End-of-Undulator)

Richard M. Bionta



We are beginning to calculate detector responses to LCLS beam

Horizontal LineOut

X, mm6050403020100-10-20-30-40-50

Pho

toE

lect

rons

/Pix

el

100,000

50,000

0

Direct imager exposed to full 8 keV FEL + Spontaneous through solid attenuator

Fluence

X, mm6040200-20-40-60

Y, m

m

20151050

-5-10-15-20

Richard M. Bionta



XTOD WBS Organized by Function

1.5 XTOD

.1 Mgmt. .2 Ctrls. .3 Mech&Vac. .4 Optics .5 Diagnostics

Controls for all instruments

Pumps, pipes, and stands between instrument tanks, by room

MasksSlitsFlipper Mrr.Gas Atten.Solid Atten.Optic TankMonochromSplit & Delay

.6 Install

SimulationDirect ImagerIndirect ImagerDiagnostic TanksSpectrometerCalorimeterCoherenceShape

Installation of all vacuum and instruments

Richard M. Bionta



Schedule emphasizes early completion of commissioning diagnostics

Controls

Mechanical and Vacuum

Front End Enclosure(FEE)

Near Experimental Hall

Tunnel #

Far Experimental Hall #

Facility Optical Systems

Fixed Mask FEE

Slits/Collimator A FEE

Slits/Collimator B FEE

Gas Attenuator FEE

Solid Attenuator FEE

Crystals and Gratings

Crystal Monochromator FEH

Pulse Split and delay FEH

Diagnostics

Modeling and Simulation

Direct Scintillator Imager

Indirect Imager

Imaging Diagnostic Tank #

Comissioning Diagnostic Tank #

Total Energy Measurement

Spectrometer

20082004 2005 2006 2007

Richard M. Bionta



Activities planned during CR

Modeling and SimulationSpontaneous / FEL simulation along beam line and during startup

Calculate Beam sizes and effects of apertures at Gas Attenuator, Cameras, etc

Optimize response of detectors to simulated beam

Component R&DSpectrometer

Total Energy

Damage

Mechanical & VacuumGas Attenuator Calculations

Richard M. Bionta



Activities after CR

Detailed Design of FEE in preparation for construction in FY06

Mech. & Vac. through Near HallSlitDirect Imager

R&D & PrototypeGas attenuatorTotal EnergySpectrometerIndirect Imager

Richard M. Bionta



Summary

XTOD transports x-ray beam to users and provides optics and diagnostics for LCLS commissioning and monitoringBasic imaging diagnostics and attenuator systems understood and supported by calculations and prototypes. The development of the other instruments will proceed in a serial fashion with priority given to commissioning diagnostics Beam models now exist allowing detailed modeling of the instrumentation. This will proceed during the Continuing Resolution.XTOD will be ready for serious R&D and Engineering effort after the CR in preparation for procurement and fabrication in FY06

Documents

Richard M. Bionta XTOD [email protected] October 12, 2004 UCRL-PRES-XXXXX X Ray Transport, Optics, and Diagnostics, Overview Facility Advisory Committee