alt.tbo: the bipolar HV-pulser

What does it look like?

Information

What is it supposed to do?

The aim of this echOmod is to get the HV Pulse done.

How does it work: block diagram

• Pulse-P->TC6320TG
• Pulse-N->TC6320TG
• Damper->TC6320TG
• NMT0572SC->HV-N->TC6320TG
• NMT0572SC->HV-P->TC6320TG->ITF-mET_Transducer
• ITF-mET_Transducer->ITF-mET_SMA
• ITF-mET_Transducer->ITF-18_Raw

About the module

Pros

• Cheaper, more robust than tobo
• Less issues with the MD0100

Cons

• As of today (20180305), the damper still lacks

Constraint and limits

Testing

• First experiment jupyter notebook and first datasets
• Driver for raspberry pi
• More tests with fixed depth experiment (for pulse quality tests).

Images

Alone

Testing with a fixed depth of water

Tests with 3 levels of HV (25, 50 and 75V) - unipolar

Details of pulses at 50V

Brief

Specs

• Needed to get 200ns wide square pulses, both in the positive and negative.
• Control of pulses must be through 3.3 or 5V tolerant logic
• Pulses height must be selectable (say with a jumper?) for ~20V, 40V, 80V (for positive pulses) and -20, -40V, and -80V for negative.
• Only power supply available is 5V

Components

• See this application note - recommend MD1213 and TC6320
• Possible (but not used in the end) high voltage source: https://datasheets.maximintegrated.com/en/ds/MAX5025-MAX5028.pdf (3 -> 30V) to be used with a 555 DC-DC convertor
• Signal back from the diod is clipped by MD0100 + back to back diods.

Power use

To be powered at 5V only.

Components

• HV: NMT0572SC
• Pulser : MD1213 and TC6320 -> see Fig.6 here, bipolar 3 level pulser.
  • TC6320, undamped, detailed here.
  • TC6320 http://ww1.microchip.com/downloads/en/DeviceDoc/20005697A.pdf for the datasheet
• Protection: MD0100+diods -- should be enough, see bottom of page 1, or Fig 9

Discussions

TODO

• Check a design w/ this idea which is similar to this other idea or this last idea.
• IMPORTANT - do these corrections for a bipulser.
• A new unipulser design is on the way

DONE

• Preliminary tests

People

• Sofian (for preparing the field with Murgen)
• Ivan for the TC6320TG