Alan Wretch, Zangers and Screwers:

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Alan Wretch, Zangers and Screwers Learning the
Trade with Bruce Peter D. Johnson Brookhaven
National Laboratory
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Enter fourth Bruce with English person,
Michael Fourth Bruce Goodday, Bruce, Hello
Bruce, how are you, Bruce? Gentlemen, I'd like
to introduce a chap from pommie land... who'll
be joining us this year here in the Philosophy
Department of the University of Woolamaloo. All
Goodday. Fourth Bruce Michael Baldwin - this
is Bruce. Michael Baldwin - this is Bruce.
Michael Baldwin - this is Bruce. First Bruce Is
your name not Bruce, then? Michael No, it's
Michael. Second Bruce That's going to cause a
little confusion. Third Bruce Mind if we call
you 'Bruce' to keep it clear?
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Welcome to the Symposium celebrating the career
of our dear friend and colleague Neville Smith
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Im here to build a beamline at the NSLS
Forget that, Bruces, lets try and do Inverse
Photoemission
Yes !!
What is Inverse Photoemission ??
Im here to try ESDIAD with Mort
Yes !!
August 1981
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Photoemission allows us to measure the properties
of the occupied electron states
Incident Photon
Electron detected
Fermi Level
Neville became famous for his pioneering
contributions to the development of this
spectroscopy
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Inverse Photoemission allows us to measure the
properties of the unoccupied electron states
Incident Electron
Photon detected
Fermi Level
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The IPES Apparatus 1981
New Spectroscopy. Needs- Electron Source and
Photon Detector
Counter
CaF Window
350 V
Iodine Vapor
Band Pass Characteristics of the Geiger-Muller
Tube
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The KRIPES Chamber Circa 1981
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K-Resolved IPES --- KRIPES
1991 Neville wins the prestigious Davisson-Germer
Award for the development of momentum resolved
photoelectron spectroscopies
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The NSLS VUV Floor 1981
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An earlier time
The Physical Properties of Liquid Metals
Brookhaven National Laboratory September 1966
.Neville Smith, Tom Faber, John Ziman.
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Enter the Image States
Bohr-Sommerfeld Quantization Condition Sf fc
fB 2pn
Electrons sitting on surface, just like
wallpaper Pendry in talk at Bell Labs
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Just Like Wallpaper
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The Energy-Loss Dilemna
At the Georgia PEC meeting Feibelman questions
whether the peak we are seeing is an energy loss
feature rather than an image state
Aaaaarrgh !!!
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June 1982
Aug 1982
Image-potential states in inverse photoemission
spectra
Image-potential states and energy loss satellites
in inverse photoemission spectra
Phil Woodruff at the AVS meeting in the Fall of
1982
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Straub and Himpsel
Dose et al.,
The Summer of 1984
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The U5 Banana Undulator
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Bruces Plan
LiF Lens
Undulator Beam
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The U5 Spin Polarized Photoemission Beamline
Bruces Plan
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The High Flux Beam Refractor
Cs Evaporator
The Pervatron
Units of space charge mpervs
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Summer 1984 Studying the Cu (111) surface
Cu(001)
Image State
Cu(111)
Image State
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Sf fc fB 2pn
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Cu(001)
Cu(111)
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The IPES Spectrometer -- Fall 1984
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Notes from a kitchen table
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Thank you Bruce
It was a lot of fun