Multi-anvil at the NSLSMichael VaughanLiping WangJiuhua ChenBaosheng LiLi LiHélène Couvy

Wei LiuCarey KoledaBill HuebschKen Baldwin

2001 Beginning of COMPRES

– Conical slit stress measurement. This enables measuring elastic strain in two (or more) different directions with respect to non-hydrostatic stress direction, an enhancement over the initial unidirectional strain measurements pioneered in 1994.

– The possibility of constructing two new hutches dedicated to high pressure science was floated.

– 38 runs were performed

2002 Construction of new hutches began.

– DOE contributed $1,440,000 through the NSLS– NSF contributed $160,000 through CHiPR– Stony Brook University contributed $50,000– D-DIA (for steady state deformation). This new

deformation device enables changing the vertical load on the sample while maintaining a constant pressure. A trial run was made using a borrowed D-DIA, with the pumping system located in the construction area for the new hutch.

– 32 runs were performed

2003 New Hutch for X17B2

• This greatly increased the efficiency of operations by the elimination of re-installation of the equipment for each beamtime, allowing a doubling of the annual number of runs, with no actual increase in beamtime.– Funding made available for building and installing a

dedicated D-DIA in X17B2– NSLS General User Proposal system adopted for all

users. This increased the number of proposals, especially from local users.

– 79 runs were performed

2004 Time-sharing with X17B3

• Installation of a removable, evacuated beam pipe through the X17B2 hutch made practical simultaneous use of the DAC and MAP.– First experiments on imaging of molten metals for

measurement of viscosity– Rotational Drickamer Apparatus (RDA) from Yale

University temporarily installed and used. A decision made to request funding for a permanent installation of such an apparatus

– 111 runs were performed

2005 Monochromatic Side Station

• Funding was obtained for the construction of an additional beamline, within the X17B2 hutch.– DOD contributed $182,000 and Stony Brook contributed

$50,000– A MAR345 imaging plate system was purchased for the

monochromatic side station– Construction began and completed for the table to support

the MAR345, a set of slits, and a press.– First experiments performed using an under-development

monochromator. The ability to perform white radiation experiments simultaneously was demonstrated.

– 100 runs were performed in the first 9 months of the 2005 fiscal year.

Stress as a variable

)**

(exp)/()/(RT

PVEdbA mn

s = M*e

(1) = M*el

(3)σ(t) = σ0sin(2 π f t)     

ε (t) = ε0sin(2 π f t - d)

(2)

Generate stresses under pressure > 3GPa

Multianvil apparatus

D-DIA

Rotational DrickamerApparatus (RDA)

Deformation DIA

Measure Stress

0 1000 2000

channel

coun

ts

det1det2det3det4

= M*el

HP device

0o

360o360o0o

2

a b

Chen 2006, COMPRES MeetingChen 2006, COMPRES Meeting

Olivine deformation at 10GPa

Multi SSD

Press

Sample

Measure plastic strain ε

~ 1mm

Rotational Drickamer Cell, Yale group

(IV) Measure stress-strain phase-lag at high pressure

-6

-5

-4

-3

-2

-1

0

1

2

24000 24500 25000 25500 26000

time

disp

lace

men

t

al2o3-2mgo

45ton 290W 02 MgO 46

Al2O3

MgO

Al2O3

~2m

m

Advance/retreat direction

-0.2

-0.1

0

0.1

0.2

0 100 200 300 400 500 600 700

MgO trend removedAl2O3-2 trend removed

Pmean=(kbar

Str

ess,

kb

ar

0 10 20 30 40 50 60-3

-2

-1

0

1

2

3

4

Stress state in NaCl

Max. T=500 C

RT

Kung et al, 2004

Study of Molten Materials under High Pressures and Temperatures

Opportunities at Synchrotron X-ray Beamlines

Bulk Properties of Melts• Viscosity

• Density

• Acoustic Velocity

900

1300

1700

40 90 140

pixels

Inte

ns

ity

Jiuhua Chen

Ultrasonic Velocity Measurements

Transducer

Buffer Rod Sample

• Reflection/Transmission Interferometry • Resonance Ultrasonic Spectroscopy • GHz Ultrasonic Interferometry• Precision ~ 10-5

Baosheng Li

Workshop Feb. 2006

• Melts and Glass Structure

• Elasticity

• Rheology

• Phase Transformations

Needs:

Soller Slit system

Needs

• High resolution stress measurement (MRI pending)

• Near real time data analysis

• Acoustic emission system

• 2000 Ton press

• Development of X17A