MSI-PP Appplication » History » Revision 2
Revision 1 (Anchi Cheng, 04/25/2017 10:44 AM) → Revision 2/12 (Anchi Cheng, 05/24/2017 11:48 PM)
h1. MSI-T PP and MSI-T2 PP MSI-PP Appplication MSI-T PP MSI-PP Application and its two-client version MSI-T2 PP are designed for phase plate workflow. To use it from myami-beta version, update your myami-beta to the current state. # Use [[Applications|Application administration]] myamiweb tool to import from _your-myami-git-clone_/leginon/applications/MSI-T2_PP.xml # Run this at _you-myami-git-clone_ to import the default settings for the new nodes <pre> python dbschema/tools/import_leginon_settings.py MSI-T_PP </pre> h2. Settings MSI-T PP is different from typical MSI-T in several ways mainly to avoid image minimizes beam-image shift in exposure and to reduce on-plane condition hysteresis by not going to lower mag and/or large defocus beam size change after multiple beam-tilt based autofocusing. focusing with beam tilt. # *PP Exposure* is set to move to the target by stage position. There is no drift adjustment # *PP Focus" has an active option that [[Special_Beam_Tilt_Calibration_for_Phase_Plate|performs beam tilt in a diagonal direction]] # Extra step of hole centering aimed to minimize the movement required in target process in *PP Exposure* node. This page is done with navigator move still in *PP Hole", and fixed target position at the center of the parent image in *PP Exposure Targeting*. development. * The steps from * Grid Targeting* to *Hole* is similar to other MSI applications. Queuing at *Hole Targeting* works well and a focus target should be chosen for use in *Z Focus* node. * *PP Hole Targeting* should not include focus target. Set it up for single hole centering, or multi-hole centering if *Hole Targeting were not overlapping but contained multiple holes. O.K. to queue. * *PP Exposure Targeting* should not use queuing. Set up as fix targets with acquisition target at the center of the image to avoid stage movement. Set up one or multiple focus target if extra accuracy in defocus is required. * *Phase Plate* node settings allow you to set the number of *PP Exposure* counts before it switches automatically, as well as how long you want to activate the new patch by beam exposure, as well as the activation time for focus spot. h2. Set up AutoIt. See Issue #3786 for example script download. h2. Operation # Set beam to on-plane condition at a previously used phase plate position. *VERY IMPORTANT* Use the same beam settings and defocus for en, fa, fc presets. -0.5 um defocus is typical. # Open Settings dialog in *Phase Plate* node, enter the current phase plate slot number (base 1), and the phase plate patch number. Click *Update* to register. # Test a few exposure throught the flow on the old phase plate patch before advance to clean phase plate patch with the green arrow in *Phase Plate* tool. The exposure should also be reset.