skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The simplest possible design for a KB microfocus mirror system?

Abstract

We report a design for a Kirkpatrick-Baez (KB) microfocussing mirror system. The main components are described, with emphasis on a ‘tripod’ manipulator, where we outline the required coordinate transformation calculations. The merit of this device lies in its simplicity of design, minimal degrees of freedom, and speed and ease of setup on a beamline. Test results and an example of the mirrors in use on Diamond Beamline I16, showing a high-resolution polar domain map of KTiOPO{sub 4} with a spot size of 1.25 µm × 1.5 µm, are presented.

Authors:
; ; ; ; ; ;  [1];  [1];  [2];  [3]
  1. Diamond Light Source, Harwell Science & Innovation Campus, Didcot, OX11 0DE (United Kingdom)
  2. (United Kingdom)
  3. School of Systems Engineering, University of Reading, Whiteknights, Reading, Berkshire, RG6 6AH (United Kingdom)
Publication Date:
OSTI Identifier:
22608403
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COORDINATES; DEGREES OF FREEDOM; DESIGN; DIAMONDS; FOCUSING; MANIPULATORS; MIRRORS; OXYGEN COMPOUNDS; PHOSPHATES; POTASSIUM COMPOUNDS; RESOLUTION; TITANIUM COMPOUNDS; TRANSFORMATIONS; VELOCITY

Citation Formats

Collins, S. P., E-mail: steve.collins@diamond.ac.uk, Scott, S. M., Hawkins, D. M., Fabrizi, F., Moser, B., Nisbet, G., Sutter, J. P., Harwin, R. C., Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, and Harwin, W. S. The simplest possible design for a KB microfocus mirror system?. United States: N. p., 2016. Web. doi:10.1063/1.4952890.
Collins, S. P., E-mail: steve.collins@diamond.ac.uk, Scott, S. M., Hawkins, D. M., Fabrizi, F., Moser, B., Nisbet, G., Sutter, J. P., Harwin, R. C., Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, & Harwin, W. S. The simplest possible design for a KB microfocus mirror system?. United States. doi:10.1063/1.4952890.
Collins, S. P., E-mail: steve.collins@diamond.ac.uk, Scott, S. M., Hawkins, D. M., Fabrizi, F., Moser, B., Nisbet, G., Sutter, J. P., Harwin, R. C., Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, and Harwin, W. S. 2016. "The simplest possible design for a KB microfocus mirror system?". United States. doi:10.1063/1.4952890.
@article{osti_22608403,
title = {The simplest possible design for a KB microfocus mirror system?},
author = {Collins, S. P., E-mail: steve.collins@diamond.ac.uk and Scott, S. M. and Hawkins, D. M. and Fabrizi, F. and Moser, B. and Nisbet, G. and Sutter, J. P. and Harwin, R. C. and Department of Physics, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE and Harwin, W. S.},
abstractNote = {We report a design for a Kirkpatrick-Baez (KB) microfocussing mirror system. The main components are described, with emphasis on a ‘tripod’ manipulator, where we outline the required coordinate transformation calculations. The merit of this device lies in its simplicity of design, minimal degrees of freedom, and speed and ease of setup on a beamline. Test results and an example of the mirrors in use on Diamond Beamline I16, showing a high-resolution polar domain map of KTiOPO{sub 4} with a spot size of 1.25 µm × 1.5 µm, are presented.},
doi = {10.1063/1.4952890},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • The simplest angular momentum schemes that permit sub-Doppler cooling have 4 levels, and one example is an F = 1 {yields} 0 transition in either a linearly or circularly polarized standing wave with a weak transverse magnetic field. The 28% abundant {sup 87}Rb isotope has an F = 1 {yields} 0 transition that is ideal for studying this case. Magnetically induced laser cooling can reduce atomic KE to below the peaks of the spatially periodic potential seen by the atoms as a result of their light shifts, thus channeling them between the planes of the standing wave. Furthermore, their deBrogliemore » wavelengths become comparable to the channel size so that the motion is quantized in these half-wavelength sized optical traps. This F = 1 {yields} 0 transition produces only one light-shifted level, and thus only one ground state sublevel that can support bound quantized states. An rf-induced transition that would change the populations of the quantum vibrational states of this potential would be particularly easy to interpret, and would be subject to easily understood Zeeman shifts in a longitudinal field. We are presently studying this problem.« less
  • A well-known method for suppressing the flute instability in an open system is to impose multipole fields which create a min B at the center of the system. It is shown in the present paper that stability can also be achieved while preserving axisymmetry. If small-scale perturbations (higher-order radial modes) are stabilized because of the finite-larmor-radius effect, the remaining long-wave perturbations may be suppressed without a min B. The only necessary condition is that the field maximum lie outside the plasma. It is shown that stability is achieved if there is no plasma near the axis and if an azimuthalmore » current varying along the axis is produced in this zone. This current produces a radial magnetic field on the order of the radial component of the main (mirror) field which decays with distance from the axis. The possibility of stabilizing the system by passing an axial current through the axial cavity is also discussed. If the plasma pressure is approximately isotropic (if there is a large mirror ratio), then the azimuthal field of this current should stabilize all modes because of the presence of shear.« less
  • A many-mirror optical system for spatial focusing of ultracold neutrons (UCN) is described. The system is used to obtain a neutron image of a slit. This system provides an approach to the solution of the problem of decreasing the gravitational chromatic aberrations.
  • This paper derives a quantum Fokker-Planck equation for a model system of a single-mode laser based on two-level atoms with dynamics of the trajectories described by the nonlinear differential Lorenz system. The trajectories are investigated in the asymptotic limit of strong pumping, or large Rayleigh number, in the region of applicability of averaging methods. Two bifurcations that arise when the damping constant of the field is varied are described: the appearance of limit cycles and Hopf inverse bifurcation.