Create a plan for pressure jump experiment

[stan-dot]

based on the confluence docs page.

We need to create sub-issues for this epic. We need to:

• [x] make a list of devices needed
• [x] make an example plan that fits the basic scientific use case
• [ ] try out at p38
• [ ] create pressure cell ophyd device https://github.com/DiamondLightSource/dodal/issues/658

[stan-dot]

tagging @barnettwilliam for reference

[barnettwilliam]

@stan-dot I can't modify the list to add this: create pressure cell ophyd device https://github.com/DiamondLightSource/dodal/issues/658

[stan-dot]

added

[stan-dot]

initial draft of devices needed

• valve
• pressure controller
• detector

plan parameters

• initial pressure
• final pressure
• number of captures before the jump
• number of captures after the jump
• ???

[stan-dot]

base rate - some detectors going at different frequencies

haven't considered how to make a generic plan doing that. one of the deliverables is to replace tfg, so will need a generic scan plan.

tfg atm does not do multiples of the base rate (???) but no gui for this

camera is the slowest (up to 20Hz), pilatuses (up to 250Hz), and tetramm (20kHz) have the same frame time

[stan-dot]

what parameters? nominal exposure times (per detector (?)) OAV only ever an ancillary measurement, but unfortunately it is the slowest

Pilatus exposure time should be the main reference point

Tetramm is set to match Pilatus

Can we run an optical camera at some divisor of the Pilatus rate, so we choose an integer close to 20Hz??

but the image could be ruined, intensity must be sensible so that it's not over- or under- saturated

[stan-dot]

we can do a small test plan in order to make the pressure cell work

[stan-dot]

meeting notes

pressure - just 1 jump

very the initial pressure 150-250 linspace

1500-3000 with 2000 the main vlaue

10s, jump, (5s, more captures high resolution), 10s after

both tetramms (i0, it) and waxs and saxs

vaery from 5 seconds to 10 minutes

shouldn't be outside those bounds