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 configurationsFACET 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; 36.2E-201 ;

10.5E-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 5.1E-203 Smith Purcell 15.3 15.5E-206 THz Studies 3.5** 3.5E-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%

UndergradsPostgradsPostdocsStaffFaculty

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-ZurichE-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, LANLE-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, ANLE-206: Characterizing Terahertz Radiation from the FACET Beam• PI: Alan Fisher• SLACE-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 OsloE-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, USCE-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 OsloE-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