PHOTON SCIENCE

In situ wavespeed measurements in the LVP at HPHT conditions are possible using the Ultrasonic Interferometry system at P61B.

This system comprises:

• Oscilloscope: Tektronix MSO 6 series

• 4 Channels
• Sampling rate up to 25 GS/s, 12 bits
• Memory 125M per channel
• 1 GHz Bandwidth
• 480 GB SSD, Windows 10
• Arbitrary Function Generator: Tektronix AFG3252C

• 2 Channels
• Wave functions up to 150 MHz
• Sampling rate up to 1 GS/s, 14 bits
• Memory 128K
• Custom high-speed relay: BGI



• DC and battery powered
• High-frequency amplifier: AMP590033

• 5 - 900 MHz
• 17.5 dB gain
• Transducer: LiNbO3



• 10 ° and 36 ° Y-cut for P & S-waves, and P-waves, respectively
• Diameter: 2.5 - 4.0 mm (ideally)
• Thickness: variable (e.g. 63 micron)
• Anvil: Fujilloy TF08 or TF05 with TEL 8, 5, 4 or 3 mm. Size: 26 mm (or 1 inch).

NB. It is very important that you mount transducers on multiple anvils before beam time (at your institute) and test them! If this work needs to be done at the station before beam time, you may not get the best results (under time pressure).

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In situ acoustic emissions detection in the LVP at HPHT conditions is possible using the Acoustic Emissions Detection system at P61B.

This system comprises:

• Measurement system: MISTRAS Micro-II PC

• 6 Channels, 3 PCI-2 cards

• Sampling rate up to 40 MS/s, 18 bits
• Bandwidth: 0.1 - 3 MHz
• Various filters (high-pass, low-pass), thresholds, and gain settings
• Max. signal amplitude: 100 dB
• Full feature AE extraction: Time of 1st Threshold Crossing, Counts to Peak, Peak Amplitude, Signal Strength, Duration, Rise Time, Counts, True Energy, RMS, and ASL
• Preamplifier: MISTRAS 20-40-60

• Gain settings of 20, 40 and 60 dB
• Powered by the AE system via the coaxial cable
• Sensors: MISTRAS micro-200HF

• Broadband sensor: 0.5 - 4.5 MHz
• Resonance frequency: 2.5 MHz
• Sensitive up to 170 °C
• Diameter = 9.5 mm, height = 11 mm
• Cable length: 30 mm
• Sensor mounting on (6) anvils



• 12 mm thick WC support ring
• 32 mm diameter anvils with TEL: 12, 9 and 5 mm
• Max. pressures up to 3, 7 and 10 GPa, respectively.
• AE signal characteristics


NB. If you want to use this system and anvils, please observe the recommendations from the beamline manager (R. Farla), unless you bring your own components. In that case, make sure they are compatible in the LVP!