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DEPARTMENT OF CONDENSED MATTER
PHYSICS
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Real Crystal Physics
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Equipment and Parameters
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1. Deformation Machine ДУ-22 (France)
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Maximum force Fmax = 5000 N
Minimum velocity of traverse displacement
V = 0.22 მკმ/წმ
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2. Acoustic Spectrometer 1 (device for measuring internal friction and elastic modulus)
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The range of measuring the internal friction
The frequency range of measuring
The temperature range
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Q-1 = 10-6 - 10-1
ν = 0,2 – 60 kHz
T = 80 - 400 K
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3. Spectrometers
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- СФ-2 (Russia)
The measurement interval
Accuracy
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186 - 1100 nm
1 %
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- Specord 75 IR ("Karl Zeiss" , Germany)
The measurement interval (in the range of wave number)
Resolution
at 3200 cm-1
at 2500 cm-1 and lower
Accuracy
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4000 - 400 cm-1
2 cm-1
1 cm-1
2 cm-1
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- AvaSpec-2048-USB2-UA (The Netherlands),
(fiber optics)
The measurement interval
Pixel
Diffraction latticeი
Diaphragm
Interface
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UV/VIS/NIR
2048
UA (200 - 1100nm)
50
USB2
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4. Optical (OSL) and high-temperature thermally stimulated luminescence (TSL) measuring device.
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OSL Stimulation by blue LED light in the regime of constant intensity (continuous-wave)
TSL measurement interval: 300 - 775 K
Heating rate: 0.05 - 2 K/s
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5. Differential calorimeter of a new generation (pulsed differential and pulsed scanning
differential calorimeters)
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Temperature range of measurements: 1,7 – 400 K
Sensitivity: 10-8 – 10-9 W
Accuracy, δc/c: 10-4
Measured samples: solid, liquid
Operating regime: pulsed, continuous
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6. Kolkhida – equipment for studying the interaction between polarized and oriented nuclei
and polarized neutrons.
Contains a spectrometer of polarized neutrons and 3He in 4He
solution cryostat with superconducting solenoid.
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The temperature of a sample in cryostat T =
23 mK under the condition of 3He
circulation
rate n = 1.10–3mol/s.
The maximum magnetic field in solenoid, H = 6 T.
The uniformity of field, ΔH/H < 10-4.
Polarization of neutrons Pn ~ 0.98 with respect to resolution energies ΔE/E < 10-2.
The fligt distanse from the moderator in the reactor radiation zone to the detector is
15.9 m and comprises the following distances:
moderator – polarizer: 12.4 m;
polarizer – analyzer: 2.5 m;
and analizer – detector: 1.0 m.
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Spectrometer of polarized neutrons
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1 – polarizer crystal; 2 – analyzer crystal; 3 – Soller collimator;
4 - guiding field electromagnets; 5 – flipper;
6 – shim; 7 – cryostat; 8 – detector.
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Parameters of the polarized neutron beam
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Brag glancing angle, Θ (deg)
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19
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12
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6
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4
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3
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Wave length, λ (Å)
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1.15
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0.74
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0.37
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0.25
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0.19
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Energy, Еn (eV)
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0.062
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0.15
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0.60
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1.3
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2.3
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Detector counting rate after
the polarizer ,
n1 (s-1)
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800
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270
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65
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33
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22
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Polarized beam intensity, I1 (n/s cm2)
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430
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200
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80
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60
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50
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Detector counting rate after
the analyzer, n2 (s-1)
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70
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23
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3.1
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0.6
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0.2
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7. Acoustic spectrometer 2.
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The frequency range of measuring:
The temperature range:
The range of deformation amplitude:
The measurement error of internal friction in the intervals:
Q-1 ~ 10-3 - 10-5
Q-1 > 10-3
The measurement accuracy of elastic modulus:
The range of heating and cooling rate:
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ν = 0,5 – 10 kHz
1,5 – 900 K
10-7 - 10-5
~ 2 %
~ 5 %
~ 0.01 %
1 - 10 K/min
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8. Scanning differential calorimeter
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The temperature range of measuring :
The heating rate:
Measurement sensitivity:
calorimeter
gravimeter
Accuracy of heat capacity measurement:
Medium:
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150 - 1100 K
0.02 K/min – 30 K/min
15 mkW
1 mkg
1 - 3 %
vacuum or inert gas
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9. Equipment for burning, hardening and hydrogenation of samples
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The maximum temperature of working chamber:
Ultimate vacuum:
Volume:
Accuracy of pressure measurement:
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10000 C
10-6 Torr
600 cm3
0.5 Torr
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