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2005  NIST SBIR request for proposals for XPS microscope.

2005  R. Browning Consultants responds to RFP.
       Ideas based on Stanford University's MicroESCA at SLAC.

2006  Good reviews on proposal 100%. Insufficient funds this FY.

2006  Second RFQ, and second proposal, 6 month SBIR PHASE I awarded.

2006  Calculations show sudden magnet field termination still gives usable

 image information. This the key difference to MicroESCA.

2006  Early prototype made to test ideas.

2007  Phase I report, PHASE II proposal, 2 year PHASE II awarded.

2008  SBIR Phase II started.
 MicroESCA's superconducting magnet and CHA
 loaned to project by Stanford University.

2008  Parts for prototype made. Calculations show very good imaging properties

with no swirl.  
     Presentation to NSLS committee. XPS microscope project given the use of
 U4A for testing.

2009  Move to National Synchrotron Light Source, Brookhaven National


2009  Design and build Proof-Of-Principle microscope installation at U4A.

2010  New final mirror added to U4A, Beam onto sample.
    August: First fill of superconducting magnet He Dewer.
    September: First test of magnet to 900 Gauss.
     September: First photoelectrons around the system.
     October: Find magnetic inclusion in flange causes high distortion,
 fixed with Fe ring. Magnetic field to 1.8 Tesla.
     October: First images, Au grids and Silk threads.
     December: Magnetic Vector Potential seen as basis of microscope

2011 January: Magnetic Vector Potential  theory of operation developed.
     March: VPPEM acronym created.
2012 Improvements to microscope. Alighment of beamline to improve
         performance. Understanding the low voltage spectra.
         Planning upgrades.

2013 Upgrade performance of instrument.  Start to get high spatial
          resolution elemental images.

2014 NSLS shuts down.

2015 Equipment moved to NSLS II

2016 Start building VPPEM version II. Start designing rotating platform
          to access the two NIST beam lines

2017 VPPEM version II complete. Begin testing using electron beam.
          Contract to buy larger radius CHA which can possibly access both
          beamlines simultaneously.

2018 Begin work on VPPEM version III. With larger CHA and two
         apertures though the system. Compact superconducting magnet
         designed and built, 2 Tesla.

2019  NIST Beamlines opened. VPPEM Instrument Readiness Review

2020  Both beams into magnet volume and coincident at sample