Experiment demonstration of a 100-ps microchannel plate framing camera

Young, B. K.; Stewart, R. E.; Woodworth, J. G.; Bailey, James E.

doi:10.1063/1.1139033

Cited by 26 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their analysis showed that the average transit time was 190 ps, with an FWHM spread (TTS) of 60 ps. The simulation results are in fair agreement with subsequent experimental measurements of Young et al [11]. The experiments utilized an MCP with D = 12 µm and L/D = 40 and resulted in an average transit time of 150 ps with a TTS of 70 ps.…”

Section: Overview Of Experimental Apparatussupporting

confidence: 86%

Picosecond timing resolution detection of -photons utilizing microchannel-plate detectors: experimental tests of quantum nonlocality and photon localization

Irby¹

2004

Meas. Sci. Technol.

View full text Add to dashboard Cite

The concept and subsequent experimental verification of the proportionality between pulse amplitude and detector transit time for microchannel plate detectors is presented. This discovery has led to considerable improvement in the overall timing resolution for detection of high energy gamma photons. Utilizing a 22 Na positron source, a full width half maximum (FWHM) timing resolution of 138 ps has been achieved. This FWHM includes detector transit-time spread for both chevron-stack type detectors, timing spread due to uncertainties in annihilation location, all electronic uncertainty, and any remaining quantum mechanical uncertainty. The first measurement of the minimum quantum uncertainty in the time interval between detection of the two annihilation photons is reported. The experimental results give strong evidence against instantaneous spatial-localization of γ-photons due to measurement-induced nonlocal quantum wave-function collapse. The experimental results are also the first that imply momentum is conserved only after the quantum uncertainty in time has elapsed [H. Yukawa, Proc. Phys. -Math. Soc. Japan, 17, 48 (1935)].

show abstract

Section: Overview Of Experimental Apparatussupporting

confidence: 86%

Picosecond timing resolution detection of -photons utilizing microchannel-plate detectors: experimental tests of quantum nonlocality and photon localization

Irby¹

2004

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The spectral response of the detectors was measured at beam line VI11 at SSRL from 450eV to 1300 eV. Beam line VI1 is a spherical grating monochromator with designed X-ray energy range from 60 to 1100 eV [8]. The beam line consists of a focusing mirror, a grazing incidence…”

Section: Spectral Responsementioning

confidence: 99%

A microchannel plate intensified, subnanosecond, X-ray imaging camera

1990

View full text Add to dashboard Cite

We have developed a microchannel plate intensified, subnanosecond X-ray cathode, a microchannel plate, electrostatic focusing optics and a subnanosecond phosphor. The detector is used for one dimensional imaging and sional Reticon camera or a streak camera. The microchannel plates employ an X-ray photocathode (CUI or CsI) deposited on the front surface of the microchannel plate to enhance their soft X-ray efficiency. Electrostatic focusing of the electrons exciting the microchannel plate also enhances the gain of the detector by an order of magnitude. The electrons are accelerated to 20 kV tor output is coupled to a Reticon camera or a streak camera with a fiber optic array. We have built and calibrated more than twenty microchannel plate intensified detectors. Efficiencies in excess of 1000 (wjcm' output per wjcm? input) have been demonstrated. The time response of the detector is less than 500ps. The efficiency if the CUI and CsI X-ray photocathodes have been measured from 450eV to 1300eV at the Stanford Synchrotron Radiation Laboratory. Data are presented on the efficiency, time response, spectral response and the spatial resolution of the detectors.the electrons from the back of the MCP. This large electric field preserves the spatial resolution in the imaging direction detector for X-ray imaging experiments, It consists of an X-ray photo-(proximity focusing)' The phosphor is coated with a thin layer of A1 (about 0.1 Pm) to allow US to apply voltage to the phosphor and to block background light.Several other versions of this detector have been developed including a detector with a transmission photocathode in place Of the MCP' In the transmission photocathode version, the X-ray Photocathode is deposited on a thin PolYProPYlene film. The photocathode is placed at the MCP location. This flux is sufficiently large that the gain of the MCP is not spectroscopic measurements. Signals are recorded using either a one dimenbefore striking a fast phosphor (indium doped cadmium sulfide). The detecgeometry is useful in applications where the incident X-ray necessary* Many variations Of this generic detector geometry are Possible depending on the incident X-ray flux levels and the application. Microchannel plateTwo different sizes of MCP have been used, 75 mm diameter and 40" diameter. Both have 12pm pores and 15pm center to center spacing. The ratio of the length to diameter of the pores is approximately 40. The MCP bias angle is 5". An electrical conductor (0.2pm of gold over 0.05pm of niobium) is applied to the back surface of the MCP. The coatings are deposited on the back surface at an agle of 45". This results in a small amount of end spoiling of the plates. The front surface of the MCP is also coated with a 0.05 pm cathode. The niobium and gold are deposited on the front surface of the MCP at an angle of 15" from normal. The plate is continuously rotated during deposition of the conductors. The photocathodes are deposited at 45". The 45" angle is X-rays will strike the photocathode instead of bare channel

show abstract

“…Until recently, fast, high-voltage pulses for electrical gating could be generated only by photoconductive switches with the concomitant complexity of a shortpulse laser. 313 However, the well-known phenomenon of avalanche breakdown 314 has now been developed so that highpower electrical pulses as short as 70 ps can be produced by purely electronic drivers. We apply the voltage pulses to a strip transmission line with a microchannel plate as the dielectric.…”

Section: Characterization Of Gatedmentioning

confidence: 99%

Laser Program annual report 1987

O'Neal¹,

Murphy²,

Canada³

et al. 1989

View full text Add to dashboard Cite

This report presents the unclassified activities and accomplishments of the Inertial Confinement Fusion (ICF) and the Advanced Laser Development (ALD) elements of the Laser Program at the Lawrence Livermore National Laboratory (LLNL) for the calendar year 1987. The classified aspects of our work are reported elsewhere. The LLNL Laser Program is supported by the United States Department of Energy. Some of the activities in Advanced Laser Development are supported by agencies of the United States Depart ment of Defense.Our objective in preparing these Laser Program Annual Reports is to disseminate the results of our work for the benefit of the inertial confinement fusion, plasma physics, and laser communities. We attempt to provide, in one volume, sufficient detail to allow full understanding, to permit critical technical evaluation, and to make it possible for others to reproduce or extend our work. Therefore, we present here new concepts, the oretical analyses, computational results, the design and configuration of experiments, and analytical data-the results of our year's research.We have organized this report into major sections that correspond to our principal technical activities. Section 1 notes the highlights of the year's technical accomplish ments and briefly summarizes Program resources and facilities. Section 2 relates our work in target theory, design, and computer code development. In Section 3, we discuss the Nova laser program, including experiments, diagnostics, and data acquisition and management, as well as the laser system and its management. Our effort in the area of ICF target technologies and materials is described in Section 4, and in Section 5 we dis cuss our work on basic laser research and development Section 6 presents our re search on solid state lasers for high-average-power applications. Finally, Section 7 reviews the ICF applications we have studied this year.

show abstract

Experiment demonstration of a 100-ps microchannel plate framing camera

Cited by 26 publications

References 13 publications

Picosecond timing resolution detection of -photons utilizing microchannel-plate detectors: experimental tests of quantum nonlocality and photon localization

Picosecond timing resolution detection of -photons utilizing microchannel-plate detectors: experimental tests of quantum nonlocality and photon localization

A microchannel plate intensified, subnanosecond, X-ray imaging camera

Laser Program annual report 1987

Contact Info

Product

Resources

About