FACET Facility Performance FY13

Christine Clarke, 25th July 2013

SAREC Meeting

2013 Schedule -- FACET User Run 2

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FACET User Run 2 – A New Philosophy Part 1

Lesson 1: Experiments need different beam configurations

FACET Run 2 was divided into different configurations and experiments were scheduled according to configuration that best matched their request

“Pencil Beam”5e9 electrons/bunch, σz~600µm, σr <20µm

Low Charge, compressed1e10 electrons/bunch, σz~30µm, σr ~30µm

High Charge, compressed2e10 electrons/bunch, σz~30µm, σr ~30µm

High Charge, over-compressed/ 2 bunch studies2e10 electrons/bunch, R56 10 mm, σr ~30µm

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FACET User Run 2 – A New Philosophy Part 2

Lesson 2: The machine needs attention on a day-to-day level

Emphasis was given on not delivering a beam to users that did not meet agreed-upon parameters.

Most of the beam time was therefore used for • machine

development, • maintenance and • characterisation

activities

These occurred every day.

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FACET Run Dates

FACET Run:

• Pencil Beam 3rd March – 24th March

• Low Charge, compressed 24th March – 13th April

• High Charge, compressed 13th April – 24th May

• R56 10 mm and two-bunch generation 24th May – 1st July

High charge configuration was not scheduled initially• First plan was to go from low charge and compressed bunches to 2-bunch

commissioning

• Introduced high charge configuration after success of low charge

Start-up Pencil beam Low Charge High Charge 2 bunch

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Scheduling Experiments

https://slacportal.slac.stanford.edu/sites/ard_public/facet/user/Pages/Schedule.aspx

• Schedule was goal-driven (e.g.

“expose samples”)

• Typically focused on one

experiment at a time

• Not running experiments 24 hours

a day meant:

• Better support from facility

staff

• Better beam

• Time to plan

Success

Pencil Beam; 59.7

Low Charge Com-

pressed; 31.4High

Charge Com-

pressed; 133.6

Laser Commis-

sioning; 19

Two Bunch; 29.7

User Beam Time delivered (hours) broken down by configuration. Commissioning of

laser with beam by E200 is included.

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Beam time by experiment

E-200; 12 E-201; 10.5

E-202; 1

E-211; 36.2

E-201 ; 10.5

E-202; 2.1

E-203; 15.3

E-206; 3.5

E-200; 93.5

E-201; 38.1

E-202; 2

E-200; 19

E-200; 29.7Experiment

Hours Delivered

Inc. Acc. down and User Off

E-200 Plasma Wakefield Acceleration 154.2 158.35E-201 Dielectric Wakefield Studies 59.1 72.8E-202 Ultrafast Magnetic Switching 5.1 5.1

E-203 Smith Purcell 15.3 15.5

E-206 THz Studies 3.5** 3.5

E-211 CERN BBA 36.2 38

Total 273.4 293.25

User Beam Time delivered (hours) broken down by experiment within each

configuration.

** (plus 40 hours approx. parasitic)

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User Time Highly Productive

• Better beam made experiments better

• Essentially no tuning time and very little accelerator down time – few interruptions

• Accelerator Operations team characterised beam prior to user shift

• Better SLAC physicist support

Hours Beam De-livered to

User 93%

Hours Accelera-tor Down on user

time4%

Hours User Off

3%

Total User Time broken down by beam status

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Experiment Procedures

• User productivity gained from

• Increased time between shifts

• Goal-based experiment shifts with a focus on getting

results

• Shift Procedures key to getting results

• Developed “template” over course of run

• Procedure for operators as well as experimenters

• FACET staff worked closely with users on procedures

Progress during User Beam time was reported on the FACET website

along with key beam parameters:https://portal.slac.stanford.edu/sites/ard_public/facet/Pages/PerformanceMetricsFY13.aspx

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Accessing FACET

• Most accesses were scheduled

for experiment installation and

maintenance (~1 day per week)

“PAMM”

• A few accesses were

“unscheduled” (on user beam

time) due to hardware failures

“User Access”

Scheduled Accesses

User (unscheduled) Accesses

Laser Com-missioning in

Access

Breakdown of FACET Accesses. Total hours =

1080

• Commissioning laser for E200

required dedicated tunnel time

FACET User Community

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Growing User Community

• Total FACET user

community grew

including on-site,

remote and data users

(112 users to date for

FY13)

• On-site/badged users

grew (50 on-site Users

in FY12, 67 on-site

Users so far in FY13)

SLAC

UCLA

Aarhus University

CERNOxford

University of HamburgStanford

University of Ferrara

Euclid

Yale

Argonne

ENSTA ParisTech

FIAS

LAL-Orsay

Mainz University

MPI

RadiaBeam

Technical University of

Lisbon

University of Düsseldorf

Oslo

Duke Johannes-burg Uni-

versityKIPT

Los Alamos

Omega-P

RegensburgSynchrotron-Soleil

TRIUMFUniversité Paris-Sud

University of AmsterdamUniversity of New MexicoUSC

Valencia U IFIC

IBM Research - Zurich

• 34 different institutions represented by FACET Users

• ~half of the institutions are outside the US

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5%

22%

7%

39%

26%

9%

27%

7%37%

19%

Undergrads

Postgrads

Postdocs

Staff

Faculty

User Breakdown

• 63% universities, 31% labs, 6% industry

• 6 undergraduate students, 25

postgraduate students

• All 6 undergraduate students and 18 of

the 25 post-graduates are on-site

(badged) users students make up 37

% of all on-site FACET users

On-Site Users only (outer ring)

All User types (inner ring)

FACET Users by work classification

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FACET User Organization

• All Users are part of the FACET User Organization

• In 2011, Patric Muggli was voted as FACET User

Organization representative

• Seat on SLUO Executive Committee – 3 year term

• Gerard Andonian – NUFO representative for FACET

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Experiment Groups

E-200: Multi-GeV Plasma Wakefield Acceleration

Experiments

• PIs: Chan Joshi, Mark Hogan, Patric Muggli

• SLAC, UCLA, MPI, Duke, University of Oslo, Stanford

University, ENSTA ParisTech

E-201: Wakefield Acceleration in Dielectric Structures

• PIs: James Rosenzweig, Mark Hogan, Patric Muggli

• UCLA, SLAC, MPI, RadiaBeam

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Experiment Groups

E-202: Ultrafast processes in Magnetic Materials

• PI: Hermann Durr

• SLAC, Stanford, University of Regensburg, IBM-Zurich

E-203: Single-shot determination of the time profile of fs

long bunches by means of coherent Smith-Purcell radiation

• PI: Armin Reichold

• Oxford, LAL-Orsay, Synchrotron-Soleil, Universite Paris-

Sud, Valencia U IFIC, LANL

E-204: Testing of metallic periodic structures at FACET

• PIs: Sami Tantawi, Valery Dolgashev

• SLAC

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Experiment Groups

E-205: High-Gradient Dielectric Wakefield Measurements

• PI: Alexey Kanareykin

• Euclid, ANL

E-206: Characterizing Terahertz Radiation from the FACET

Beam

• PI: Alan Fisher

• SLAC

E-207: High-Gradient THz-scale Two-Channel Coaxial

Dielectric Wake Field Accelerator Experiment

• PI: Sergey Shchelkunov

• Yale, Omega-P, KIPT

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Experiment Groups

E-208: Direct measurements of the transverse long-range wake-

fields of CLIC main linac accelerating structures

• PI: A. Grudiev

• CERN, University of Oslo

E-209: Study of the Self-Modulation of Long Lepton Bunches in

Dense Plasmas and its Application to Advanced Acceleration

Techniques

• PI: Jorge Vieira, Patric Muggli, Mark Hogan

• Technical University of Lisbon, MPI, SLAC, UCLA, USC

E-210: Trojan Horse Plasma Wakefield Acceleration

• PIs: James Rosenzweig, Bernhard Hidding

• UCLA, University of Hamburg, University of Dusseldorf, MPI,

RadiaBeam, SLAC

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Experiment Groups

E-211: Experimental verification of the effectiveness of linear

collider final-focus feedbacks and alignment algorithms

• PI: Andrea Latina

• CERN, University of Oslo

E-212: Radiation from GeV electrons in diamond with

intensities approaching the amplified radiation regime

• PI: Ulrik Uggerhoj

• Aarhus University, University of Ferrara, Frankfurt Institute

for Advanced Studies, SLAC, CERN, TRIUMF, University

of New Mexico, University of Amsterdam, Johannesburg

University

Future Schedule - FACET User Run 3 and beyond

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Current FY14 Plans

• Start FACET at beginning of next Fiscal Year (~October

1st) – after LCLS

• Start commissioning of positrons from positron target

• Set up electron beam for 2-bunch configuration in

Sector 20

- Primary users are PWFA and DWA studies

- Laser will also be operational

• FACET will not operate over the Winter shutdown

• FACET will restart ~1st February 2014

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Goals for Future Operations

We want to maximise User Time whilst keeping productivity

high

• Grow our user base with new experiments

• More FACET staff to continue to work closely with users

In FY14, a greater proportion of beam time can be for users:

• Bulk of laser commissioning done- less time in access

required next time

• Beam configurations well understood and documented-

less machine development required to repeat them