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  • 1
    Electronic Resource
    Electronic Resource
    The ISIS pulsed muon facility (1992)
    Springer
    The European physical journal 56 (1992), S. S232 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The pulsed muon facility at the ISIS spallation neutron source of the Rutherford Appleton Laboratory is described. Work currently in-hand to increase the performance of the proton synchrotron from its present 100 microamperes at 750 MeV to its design goal of 200 microamperes at 800 MeV are described in conjunction with plans to expand the muon facility itself. Within a period of three years it will be possible to offer five simultaneous experimental ports with single muon pulses at 50Hz from a surface/cloud facility on the south side of the extracted proton beam, and a superconducting decay channel on the opposite side. Such an overall facility will offer unique opportunities for pulsed muon science to the end of the decade and beyond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02426802
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  • 2
    Electronic Resource
    Electronic Resource
    New RIKEN-RAL pulsed µCF facility and X-ray studies on DT-µCF (1996)
    Springer
    Hyperfine interactions 101-102 (1996), S. 521-538 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In November 1994, the construction of a new superconducting muon channel of the RIKEN-RAL muon facility at ISIS of Rutherford Appleton Laboratory was completed. Subsequently, important features, such as the highest instantaneous intensity with a single-pulse structure and a high purity have been confirmed. Along with the installation of advanced µCF experimental equipment, including a high-purity D-T mixture target system with an in situ3He removal capability and a 4 T confinement magnet, an advanced µCF experiment, e.g. a precise X-ray measurement on µ-α sticking in dtµ-µCF will be realized. An account of the commissioning experiments, a plan for the earliest phase of the µCF experiment and possible future directions are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02227665
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  • 3
    Electronic Resource
    Electronic Resource
    Longitudinal muon spin relaxation in organic radicals in the vapour phase (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 773-777 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The aim of this work is the study of longitudinal field relaxation for organic radicals in the gas or vapour phase, for which the technique of Muon Spin Relaxation proves to be uniquely suitable. Following on from the first such study of the muonium substituted ethyl radical in gaseous ethene [1], the present work represents the beginning of a systematic study of species of various molecular symmetries and still higher molecular weight, with a view to investigating their collisional dynamics. Preliminary data for the muonium substituted cyclohexadienyl radical in benzene vapour, and the results of tests for radical formation in acetylene and carbon monoxide, are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397728
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  • 4
    Electronic Resource
    Electronic Resource
    Positive muon data analysis at ISIS (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 1113-1119 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The pulsed surface muon beam of the Rutherford Appleton Laboratory is well suited to performing μSR measurements in zero and low magnetic fields with the longitudinal set-up. In this paper we describe our data analysis procedure and the effect of the collimation on the spectra. The determination of the efficiency ratio of the telescopes is discussed. We point out that for some measurements it is important to take into account the muon beam structure properly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397769
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  • 5
    Electronic Resource
    Electronic Resource
    A pulsed surface muon beam andμSR facilities proposed for the UK (1984)
    Springer
    Hyperfine interactions 19 (1984), S. 945-951 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Spallation Neutron Source, SNS, under construction in the United Kingdom offers the possibility of an intense pulsed pion or muon source and aμSR facility for condensed matter spectroscopy has been proposed. A design and specification is presented for a pulsed surface muon beam. Features include negligible electron contamination, the possibility of rotating the polarisation and — particularly important — the capability of varying the pulse width. Operation with cloud muons of both charge signs up to 70 MeV/c and with pions up to 200 MeV/c would also be possible. The pulsed nature of the source would allow the full muon intensities to be used forμSR experiments. The potential performance is such that an optimised facility would increase the world total muon stop rate for conventional time-differentialμSR by an order of magnitude. The majority ofμSR applications would benefit simply from the increased intensity, some benefit especially from the frame-length and duty cycle. Emphasis is to be placed on longitudinalμSR, on the development of RF techniques (particularly for chemical applications) and onμSR in conjunction with synchronous pulsed excitation of the sample. A scheme for the excitation of a certain bandwidth within a high frequencyμSR spectrum, to display individual spectral lines for instance, is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02066141
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  • 6
    Electronic Resource
    Electronic Resource
    Muon level crossing resonance in aluminium (1994)
    Springer
    Hyperfine interactions 85 (1994), S. 59-65 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross relaxation between implanted positive muons and27Al nuclei in Al metal, lightly doped with Cu to impede the muon diffusion, shows weak resonances at 2.3 and 4.0 mT. Assignment of these to polarization transfervia the 1/2 ↔ 3/2 and 3/2 ↔ 5/2 transitions of the (J=5/2) spins leads to a quadrupole coupling constante 2qQ/h=1.8(1) MHz,i.e. an electric field gradient on Al nuclei immediately adjacent to the muon siteq=0.048(3) a.u., with a small departure from axial symmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069402
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  • 7
    Electronic Resource
    Electronic Resource
    Development of the pulsed muon facility at ISIS (1994)
    Springer
    Hyperfine interactions 87 (1994), S. 1099-1104 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The ISIS pulsed surface muon facility at RAL is presently undergoing a major expansion to provide three experimental ports with simultaneous single muon pulses at 50 Hz. This upgrade, funded by the European Community (EC), is described together with recent development results which are relevant to its future scientific programme. These new beam lines are expected to be available for experiments in June 1993.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068510
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  • 8
    Electronic Resource
    Electronic Resource
    The ISIS pulsed muon facility: Past, present and future (1991)
    Springer
    Hyperfine interactions 65 (1991), S. 1175-1181 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The pulsed muon facility at ISIS of the Rutherford Appleton Laboratory has been operational since March 1987. It is now fully scheduled for condensed matter research using polarised surface muons, atomic physics with sub-surface muons, and μCF experiments requiring negative cloud muons. The design and performance of the present beam are briefly discussed and recent improvements to the facility are described. Essential future upgrades have recently received international support and funding, which will lead to a complete facility comparable in extent to those of the continuous meson factories at PSI and TRIUMF, but with the unique advantages of the pulsed nature of the source. Such an upgraded facility will provide unprecedented opportunities for muon science at ISIS, unmatched by any other facility until the end of the decade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397776
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  • 9
    Electronic Resource
    Electronic Resource
    Construction of Riken-ral muon facility at ISIS and advanced μSR (1994)
    Springer
    Hyperfine interactions 87 (1994), S. 1091-1098 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By utilizing the intense pulsed proton beam available at the ISIS facility of RAL, the new muon facility project of an advanced superconducting muon channel funded by the RIKEN is now under construction. The new facility, by adopting the superconducting solenoid system, will produce the strongest backward decay pulsedμ + orμ −in the momentum range from 20 MeV/c to 120 MeV/c. Also, by adopting the pulsed magnetic kicker, each one of two muon pulses will be supplied to two extraction channels simultaneously. Various important muon science experiments including advanced pulsedμ −SR andmu +SR experiments will be realized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068509
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  • 10
    Electronic Resource
    Electronic Resource
    Two-photon laser spectroscopy of the muonium 1S–2S transition (1991)
    Springer
    The European physical journal 21 (1991), S. 241-243 
    Details
    ISSN: 1434-6079
    Keywords: 36.10.Dr ; 32.30.—r
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The 12 S 1/2(F=1)−22 S 1/2(F=1) energy interval in muonium has been investigated by Doppler-free two-photon laser spectroscopy. The transition was observed by uniquely identifying and counting the muons released after the photoionization of the 2S state by the same laser field. The measured transition frequency of 2455 528016(58)(43) MHz is in good agreement with QED calculations. The experiment can be interpreted as a test of the Lamb shift contributions at the 1% level. The method is also well suited for a precise determination of the mass of the positive muon in a muoniumhydrogen isotope shift measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426380
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