2013-SAREC-presentation-FACETfacility-Clarke

Report
FACET Facility Performance
FY13
SAREC Meeting
Christine Clarke, 25th July 2013
2013 Schedule -- FACET User Run 2
FACET User Run 2 – A New Philosophy Part 1
Lesson 1: Experiments need different beam configurations
“Pencil Beam”
5e9 electrons/bunch, σz~600µm,
σr <20µm
FACET Run 2 was divided
into different configurations
and experiments were
scheduled according to
configuration that best
matched their request
Low Charge, compressed
1e10 electrons/bunch, σz~30µm,
σr ~30µm
High Charge, compressed
2e10 electrons/bunch, σz~30µm, σr
~30µm
High Charge, over-compressed/ 2 bunch studies
2e10 electrons/bunch, R56 10 mm, σr
~30µm
3
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.
4
FACET Run Dates
Start-up Pencil beam Low Charge
High Charge
2 bunch
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
5
Scheduling Experiments
https://slacportal.slac.stanford.edu/sites/ard_p
ublic/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
Two
Laser
Commissi Bunch,
oning, 19 29.7
High
Charge
Compress
ed, 133.6
Pencil
Beam,
59.7
Low
Charge
Compress
ed, 31.4
User Beam Time delivered (hours) broken
down by configuration. Commissioning of
laser with beam by E200 is included.
6
Beam time by experiment
Experiment
E-200 Plasma
Wakefield
Acceleration
E-201 Dielectric
Wakefield
Studies
E-202 Ultrafast
Magnetic
Switching
E-203 Smith
Purcell
E-206 THz
Studies
E-211 CERN
BBA
Total
E-200, 12
Hours Inc. Acc. down
Delivered and User Off
E-201, 10.5
E-202, 1
E-200, 29.7
E-202, 2
154.2
158.35
E-200,
19
E-211, 36.2
E-201 , 10.5
E-201, 38.1
59.1
E-202, 2.1
72.8
E-203, 15.3
5.1
E-206, 3.5
5.1
E-200, 93.5
15.3
3.5**
36.2
273.4
15.5
User Beam Time delivered (hours) broken
3.5
down by experiment within each
configuration.
38
293.25
** (plus 40 hours approx. parasitic)
7
User Time Highly Productive
Hours
User Off
3%
Hours
Accelerat
or Down
on user
time
4%
Hours
Beam
Delivered
to User
93%
• 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
Total User Time broken down
by beam status
8
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 9
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”
User
(unschedule
d) Accesses
Laser
Commissio
ning in
Access
Scheduled
Accesses
Breakdown of FACET
Accesses. Total hours = 1080
• Commissioning laser for E200
required dedicated tunnel time
10
FACET User Community
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)
University of
Hamburg
University of
Ferrara
Stanford
Oxford
Euclid
Yale
CERN
Aarhus
University
Other
UCLA
SLAC
Argonne
Technical
Duke
University of
ENSTA
Lisbon
ParisTech
TRIUMF
FIAS
University of
IBM Research Amsterdam
- Zurich
University of
Johannesburg
Düsseldorf
University
University of
KIPT
New Mexico
LAL-Orsay
Université
Los Alamos
Mainz
Paris-Sud
University
USC
MPI
Valencia U
Omega-P
IFIC
Oslo
RadiaBeam
Regensburg
SynchrotronSoleil
• 34 different institutions represented by FACET Users
• ~half of the institutions are outside the US
12
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
19%
26%
9%
6%
On-Site Users
only (outer ring)
22%
27%
7%
37% 39%
8%
Undergrads
Postgrads
Postdocs
Staff
FACET Users by work
Faculty
classification
All User types (inner ring)
13
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
14
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
15
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 ParisSud, Valencia U IFIC, LANL
E-204: Testing of metallic periodic structures at FACET
• PIs: Sami Tantawi, Valery Dolgashev
• SLAC
16
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
17
Experiment Groups
E-208: Direct measurements of the transverse long-range wakefields 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
18
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
19
Future Schedule - FACET User Run 3 and beyond
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
21
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
22

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