Transcript Pulsed Field Facility (PFF) Chuck Mielke Pulsed Magnets on the floor (10/2009) • • • • • • Cell 1 (50 T Mid Pulse, 15 mm, 300 msec) Cell 2

Pulsed Field Facility (PFF)
Chuck Mielke
Pulsed Magnets on the floor
(10/2009)
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Cell 1 (50 T Mid Pulse, 15 mm, 300 msec)
Cell 2 (65 T short pulse, 24mm, 25 msec)
Cell 3 (65 T short pulse, 15 mm, 25 msec)
Cell 4 (65 T short pulse, 15 mm, 35 msec)
60T Long Pulse, 2500 ms, 32 mm,100 msec flattop
100T Multi Shot, 2500 ms,15mm, 20 msec above 40T
– Operational to 85 T
• 300T Single Turn, 10 mm, 0.006 ms
– Operational to 240 T (routine to 170 T)
Non-Pulsed Magnets at NHMFLPFF available to Users
• 20T SC (Zapf)
– Dil-fridge, VSM, He3, Cp….
• Magnet failed in April ’08, replacement magnet to arrive in Dec ‘09
• 17T SC (Singleton)
– Cantilever magnetometry, transport, He3, EPR
• 15T RUS (Betts)
– Resonant Ultrasound, He3
• 15T Staff Lab (Crooker/Jaime/McDonald)
– Optics, Cp, EPR, He4 flow
• 14T PPMS (Zapf)
– VSM, Cp, transport, He4 flow
• 7T Split Coil Optical Access (Crooker)
– Optics, He4
PFF Field Profiles
NHMFL Pulsed Magnet Field Profiles
80
Capacitor Driven Magnet Profiles
50 T Mid Pulse
60 T millisecond pulse magnet
65 T User Magnet
100 tesla MS magnet
60
Field (tesla)
Controlled Waveform Pulses
100 ms flat top
Optics pulse (Linear Ramp)
200 ms flat top
Stepped fields (Specific Heat Experiments)
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1.0
Time (seconds)
1.5
2.0
2.5
User Support Staff
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Fedor Balakirev (Electrical Transport)
Jon Betts (Resonant Ultrasound)
Scott Crooker (Optics)
Neil Harrison (Magnetization)
Marcelo Jaime (Heat Capacity)
Ross McDonald (GHz/RF and Torque Magnetometry)
Albert Migliori (Resonant Ultrasound)
Dwight Rickel (Pulse Echo Ultrasound)
John Singleton (Magnetization)
Chuck Swenson (Pulsed Magnet Design)
Vivien Zapf (Thermodynamics and Dielectrics)
New Developments 2009
• 100T MS in User Ops mode
• Replacement Insert Completed
• 60T LP Fully Operation (to 55 T)
• Very High Quality Data
– TDO data is comparable to Hybrid (Sig:Noise)
• Short Pulse Techniques Expanded
• Cantilever measurements in L-He3 on a rotator!
• L He-4 Consumption Addressed
• Replacement 20T magnet and PPMS Recovery
60T Long Pulse Finely Tuned
Techniques
HTc Data from
G. Lonzarich et al.
Note: Data are
Up and Down
Sweeps at 1.2 K
(no heating)
Management Changes
at LANL NHMFL-PFF
• May: MPA-NHMFL GL took a new assignment at
LANL
• Acting Head of User Program
• August: MPA-NHMFL and MPA-10 merged
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New Group MPA-CMMS (Cond. Matt. Magnet Science)
New Group has a total of about 70 people
NHMFL-PFF Function and Mission UNCHANGED
Why do this? Answer = Better Management
• September: Job Ad Released
• http://www.hr.lanl.gov/JobListing/SingleJobAd.aspx?JobNumber=218413
• Will be advertised in Physics Today in Nov. & Dec. 2009