55729922
Experiments on a 14.5 GHz ECR Source
A device for measuring the speed of the wind at medium altitude by the Doppler effect within the visible frequency range comprises a laser which emits pulses of light, a telescope which receives a scattered light and an interferometer used to measure the spectral shift of the scattered light in relation to the emitted pulse of light. The interferometer is a Fabry-Perot interferometer in which a part of one of the two mirrors of the interferometer is covered with an excess thickness of silica to form two separate filters. The spacing of the two mirrors and the excess thickness of silica are determined in such a manner that the pass bands of each one of the two filters thus constructed are centered on the flanks of the spectral distribution of the backscattered light.
121894301
Studies on ECR4 for the CERN ion program
The CERN heavy ion community, and some other high energy physics experiments, are starting to demand other ions, both heavy and light, in addition to the traditional lead ions. Studies of the behavior of the afterglow for different operation modes of the ECR4 at CERN have been continued to try to understand the differences between pulsed afterglow and continuous operation, and their effect on ion yield and beam reproducibility. The progress in adapting the source and ion beam characteristics to meet the new demands will be presented, as will new information on voltage holding problems in the extraction.
102555920
The LHC Lead Ion Injector Chain
55729922
Experiments on a 14.5 GHz ECR Source
A device for measuring the speed of the wind at medium altitude by the Doppler effect within the visible frequency range comprises a laser which emits pulses of light, a telescope which receives a scattered light and an interferometer used to measure the spectral shift of the scattered light in relation to the emitted pulse of light. The interferometer is a Fabry-Perot interferometer in which a part of one of the two mirrors of the interferometer is covered with an excess thickness of silica to form two separate filters. The spacing of the two mirrors and the excess thickness of silica are determined in such a manner that the pass bands of each one of the two filters thus constructed are centered on the flanks of the spectral distribution of the backscattered light.
119401628
The Electron Cooling Device for LEAR
The experiments1,2,3 in which low energetic protons were cooled by a “cold” electron beam have proved that this method is a very powerful technique to improve low energy beams and to increase their phase space density by several orders of magnitude in short times. The theoretical understanding of the cooling process is well advanced4,5,6. The applications of this technique, which was invented and developed in Novosibirsk, are manifold7. It seems to be clear that its main domain is the cooling of non-relativistic ions. However, also at extremely high energies, cooling of protons and antiprotons with stored electrons (cooled themselves by synchrotron radiation) can be contemplated8,9.
115300845
Status and first beam measurements on the CERN RFQ
54867630
Superconducting cosmic strings with massive fermions
Abstract Fermions which couple to the fields comprising a Nielsen-Olesen vortex (cosmic string) can generally exist as massive bound modes on the string. If these fermions carry electromagnetic charge then the string will interact with external electromagnetic fields in a manner significantly altered from the superconducting string scenario of Witten. The current in the string oscillates at a characteristic resonant frequency, ∼ ω , and therefore produces a signature of narrow band radiation. We also give an accounting of the relevant anomalies responsible for fermionic superconducting strings.
122396660
Theoretical Expectations for Mass Scales of the Fourth Generation and Higgs Bosons
We discuss two classes of theories that have something to say about fourth generation quark and lepton masses (as well as Higgs). One is based upon universality of low energy parameters as determined by the renormalization group: infra-red fixed points. The other is a toy model of geometric heirarchy which may arise in a novel scheme of dimensional reduction without compactification.
117629294
Broken Symmetry and the Accelerated Observer
Spontaneous symmetry breaking affords an interesting probe of the phenomenon of “acceleration radiation” in general relativistic quantum field theory and raises a peculiar paradox. Accelerated observers infer the presence of particles in the vacuum in a thermal distribution with a temperature proportional to the proper acceleration. Nonetheless, by ever increasing the temperature (acceleration) a broken symmetry cannot be restored without violating general covariance. How does the accelerated observer interpret this outcome dynamically?
117978488
Fixed Points: Fermion Mass Predictions
Familiar theoretical relationships exist amongst the masses of the light fermions in SU(5):1 
 
$$ \frac{{{m_d}}}{{{m_e}}} \approx \frac{{{m_s}}}{{{m_{\mu }}}} \simeq 4\pm \frac{\hbox{$\scriptstyle 1$}}{\hbox{$\scriptstyle 2$}} \quad \frac{{{m_b}}}{{{m_{\tau }}}} \simeq 2.75\pm .25 $$ 
 
These result from essentially three ingredients: (a) the Higgs mechanism which relates the fermion mass to the Higgs-Yukawa (HY) coupling constant by \( {m_f} = {g_f} /\sqrt {2} \approx {g_f} \cdot (175\quad GeV) \) (b) the renormalization group (RG) equations which describe the evolution of the (HY) couplings down from MX to low energies and (c) the boundary conditions from SU(5), assuming a 5 and 24 of Higgs, which relate g−1/3 quark (MX) = g−1 lepton (MX) within a given generation. Thus one obtains: 
 
$$ \frac{{^{m} - 1/3}}{{^{m} - 1}} = \frac{{^{g} - 1/{{3}^{{(\mu )}}}}}{{^{g} - {{1}^{{(\mu )}}}}} \approx {{\left( {\frac{{{{\alpha }_{3}}\left( \mu \right)}}{{{{\alpha }_{3}}\left( {{{M}_{X}}} \right)}}} \right)}^{{8/2{{b}_{0}}}}} + {{\left. {\left( {electroweak} \right)} \right|}_{{\mu \simeq {{m}_{{quark}}}}}} $$ 
 
(2) 
 
and the numerical results of eq. (1) follow to one loop accuracy with Λs ~. 4 GeV. We note that ingredients (b) and (c) do not apply to models with composite Higgs bosons (e.g. ETC) or composite fermions on a scale of M′ < MX since the RG equations demand pointlike particles over the entire range of the desert. Though the results for md/me and ms/mμ are questionable we note that they are qualitatively correct. We take the “prediction” for mb/mτ to be a successful result of SU(5) and we seek to extend the above analysis to much heavier objects; either a very heavy top-quark or a heavy fourth generation of quarks and leptons.
116969793
Non-linear quantum mechanics as a relaxation mechanism for the cosmological constant