X-17 DAC Operations at NSLS

1. X-17 DAC Operations at NSLS Progress Report June 2007 Jiuhua Chen

2. Operations Summary • Contributing user agreement with NSLS: 50% general user time and 50% contributing user (COMPRES) time (25% for users, 25% for development). • X-17C operates 100% of time for energy-dispersive and monochromatic diffraction • ~ 160 days accountable beamtime (G+C users) • X-17B3 operates 25% time dedicated, 25% parasitic with X-17B2. Monochromatic and energy dispersive (On-line laser heating) • ~ 51 days accountable beamtime (G+C users) • All beamtime allocated by proposals submitted to NSLS General User System • Beamlines are running with only 1 staff person for each station.

3. 1. <Ga-Ga> 2. <Ga-Ga> 3. <Ga-Ga> 4. <Ga-Ga> 2007 NSLS Users’ meeting: “Best Poster Award” NSLS Publication number list X17C Search Results 2006 Publications X17C: 27 X17B3: 7 Ruby System: 6 X17B3 X17B2 U2A Diffuse scattering measurement at X17B3 using high energy (80keV) monochromatic beam

4. Major upgrades • Control system: CAMAC system -> VME module • EPICS control software: GSECARS compatible • Computer upgrade • Installation of video cameras for stepper micrometers for remote control

5. Urgent demands and solutions Laser heating system: ($200k) Online IP detector: ($120k) Motorized lift table SSD COMPRES capital equipment fund ($120) NSLS allocation of shared MAR345 IP detector

6. Technical & Scientific Plan • Basic techniques serving the large demands in COMPRES community: EDXD, ADXD (two-dimensional), Radial entrance XD, single crystal XD, in situ laser heating. • Unique challenging technique: High energy diffuse scattering for PDF study and other melt properties research ……

7. Adjustment of management team Current: PI: Jiuhua Chen CoPI: Tom Duffy, Mark Rivers and Alex Goncharov New (Proposed): PI: Tom Duffy & Don Weidner (Management team: Mark Rivers, Alex Goncharov, Jiuhua Chen, and Chi-chang Kao)

8. Beamline related personnel • New beamline scientists for replacement of retirement of current scientists (search starts soon). • SBU-BNL joint appointment (interviewing candidates). • MPI research faculty (search on going)

9. Strategic Plan • Provide a vital community facility for mineral physics • Define a significant focus for the NSLS program that enables it to become unique in the world in diamond cell research 3. Look forward to the NSLS II in such a manner that COMPRES will have significant access to this new facility.

10. Earth Science Perspective at NSLS II J. Chen, M. Nicol, D. Weidner, H. Mao “NSLS-II is a proposed new state-of-the-art medium energy storage ring designed to deliver world leading brightness and flux with top-off operation for constant output.” Superlative spatial (1 nm) and energy resolution (0.1 meV)

12. Donald Weidner, SUNY Stony Brook. Weidner has experience in synchrotron-based multi-anvil and diamond cell experiments. He also has extensive knowledge of beamline development at NSLS. As PI, Weidner will provide overall guidance and supervise beamline personnel for the DAC-XR facility. Weidner will also serve as a liaison between the diamond cell and multi-anvil programs at X17. In this way, we will achieve synergy and coordination between the high-pressure groups that could not be achieved otherwise. Weidner provides on-site leadership that is essential for proper management and oversight as well as rapid response to both technical problems and scientific opportunities as they develop. Weidner will also direct scientific research direction that takes unique advantages at the facility (e.g. high energy melt/glass x-ray scattering) and seek external funding and supports (e.g. personnel support from SBU and the NSLS) to the facility.

13. Thomas Duffy, Princeton University. Duffy is a diamond anvil cell specialist and has been a user of the NSLS since 1993. He has experience in a wide variety of synchrotron based high-pressure experiments, and formerly served as beamline scientist at the GSCECARS facility of the Advanced Photon Source. Duffy will coordinate the scientific agenda for the new DAC-XR program, co-supervise beamline postdoc fellows, serve as interface to the user community as well as seek for external funding for facility development and related scientific research.

14. Mark Rivers, GSECARS, U. of Chicago. Mark Rivers is manager of the GSECARS sector at the Advanced Photon Source which is one of the most productive and successful beamlines at the APS. He is also part of the team that has also remotely managed X-26 of the NSLS for many years. Rivers brings the technical resources of GSECARS to help strengthen the NSLS program. This has already been done informally over the years in critical areas such as focusing optics, detectors, and software. GSECARS has expertise in these areas and also in mechanical design. The participation of GSECARS also enables development of common tools across beamlines which makes it easier for users to carry out experiments at multiple beamlines. Rivers will thus supply technical expertise to the management team.

15. Alex Goncharov, Geophysical Laboratory, Carnegie Institution of Washington. Goncharov has extensive experience in optical systems for high-pressure research. He will be intimately involved in the design, testing, construction, and operation of the new laser-heating system at X17B3. He also will serve as a liaison between the x-ray and infrared facilities at NSLS.

16. Jiuhua Chen, Florida International University. Chen, the previous PI of the DAC program at X17, has experience in synchrotron-based multi-anvil and diamond cell experiments. He also has extensive knowledge of beamline development at NSLS. Chen will direct scientific research direction that takes unique advantages at the facility (e.g. high energy melt/glass x-ray scattering).

17. Chi-chang Kaois director of the NSLS. It is essential to involve the NSLS in the strategic planning for the beamline and the transition to NSLS-II. Chi-chang will serve to link and develop the high-pressure activities at X17-DAC within the broader community of materials scientists and crystallographers at Brookhaven. Chi-chang will also serve as a liaison with NSLS staff for new beamline and facility developments at X17-DAC including beamline optics (monochromators, focusing optics, detectors) and large-scale infrastructure development (X17A, NSLS-II).