View
3
Download
0
Category
Preview:
Citation preview
Travels with an i.nerant magnet: Bringing specialised equipment to
facili.es Alex Holmes
Advances on Sample Environment and Experimental Control
Lund September 10-‐11, 2015
www.europeanspalla.onsource.se
Acknowledgments
Elizabeth Blackburn Alistair Cameron Ted Forgan Louis Lemberger Josh Lim Jon Perrins Randeep Riyat Lingjia Shen Gary Walsh Marek Bartowiak Jorge Gavilano Mark Laver Joachim Kohlbrecher Jonathan White Markus Zolliker
Dave Bowyer Charles Dewhurst Ken Honnibal Eddy Lelièvre-‐Berna Paulo MuX Ralf Schweins Anke Watenphul Mar.n von Zimmerman Ute RueZ Olof Gutowski Sebas.an Müelbauer Andre Heinemann
Wolf-‐Dieter Stein Oleg Prokhnenko
Marc Savey-‐BenneZ
Steve King Andy Church Paul Frodsham Dave Bunce Richard Down
Scien.fic Mo.va.on: Why do we need SANS at high fields?
• Flux laXces in clean high-‐Tc superconductors give informa.on about pairing and Fermi surface.
• Flux laXces commonly studied using Small Angle Neutron ScaZering (SANS)
• Evolu.on seen up to and beyond previous limit of 11 T. • Ambient condi.ons – alignment of anisotropic par.cles
16 T
YBCO
The Birmingham 17 T magnet for small angle neutron/X-‐ray scaZering
• Max field 17 T, parallel to beam • Temperatures 1.6 K – 300 K
(50 mK to come) • ±10º access entry and ±11º exit • 0.1% uniformity in B over 1 cm3
• In-‐situ sample change (by trained operator)
• Room temperature access to bore (with addi.onal insert)
• Very low background
• Fast cooldown (~20 mins 300K to base) and field ramp (40 mins to 17 T) • 400 kg with cryogens • Labview running on PC with RS232 connec.on to facility
Rev. Sci. Instrum. 83, 023904 (2012)
Sample change is possible with magnet cold
Rev. Sci. Instrum. 83, 023904 (2012)
Fast cooldown and thermal response
Rev. Sci. Instrum. 83, 023904 (2012)
Rota.on stage and room temperature insert
Room temperature insert:
• ±7º entry access • Temperature controlled 10-‐50 ºC
• Sample change possible at 17 T
Where have we been?
9
ISIS Birmingham
ILL
PSI FRM2
DESY HZB
ESRF
Pump outer vacuum can
Take out transport bolts
Open crates
How to do an experiment at a new facility
Send to Facility
Pack up
Prepare for sending
10
Check forces
Test control soqware
Do Experiment!
Send to next facility!
Test for ac.va.on
AZach transport bolts
Wait to warm up
Pack up crates
Remove cryogens
Remove nitrogen and fill liquid Helium
Check for leaks
Pre-‐cool with liquid nitrogen
Connect rack, pumps etc.
Machine support plates
Implement communica.on
protocol
Conclusions
Cri.cal factors for success: – Interac.ve rela.onship with manufacturer – Coopera.on from facili.es – Close interac.on with facility soqware people – Close interac.on with beamline scien.sts and technicians – Expert users (us) – Collabora.ons with other users
11
12
Thanks for your aZen.on!
13
Recommended