Superconducting magnets for the CBA project

Bleser, E.; Cottingham, J.; Dahl, P.; Engelmann, R.; Fernow, R.; Garber, M.; Ghosh, A.; Goodzeit, C.; Greene, A.; Herrera, J.; Kahn, S.; Kaugerts, J.; Kelly, E.; Kirk, H.; Leroy, R.; Morgan, G.; Palmer, R.B.; Prodell, A.; Rahm, D.; Sampson, W.; Shutt, R.; Stevens, A.; Tannenbaum, M. J.; Thompson, P.; Wanderer, P.; Willen, E.

doi:10.1016/0168-9002(85)90094-4

Cited by 18 publications

(7 citation statements)

References 9 publications

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“…Surprisingly, perhaps, some of these effects are stronger for lead ions than for protons, because the charges in the nucleus of the ion behave coherently. 2 Quantities such as the energy loss per turn from synchrotron radiation, and the radiation damping time for ions, are obtained from the familiar formulas for electrons by replacing the classical electron radius and the mass by those of the ions. The principal characteristics of the incoherent synchrotron radiation of fully stripped ions of atomic number Z and mass number A can be related to those of protons (assuming the same field in the bending magnets) by, 8) where U is the energy lost per ion per turn by synchrotron radiation, u c is the critical energy of the synchrotron radiation photons, N is the number of photons emitted per turn, and τ is the synchrotron radiation damping time.…”

Section: Synchrotron Radiation From Lead Ionsmentioning

confidence: 99%

LHC Machine

Evans¹,

Bryant²

2008

J. Inst.

1,797

1,344

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2008 JINST 3 S08001 9.3.1 The VME and PC Front End Computers 9.3.2 The PLCs 9.3.3 The supported fieldbuses 9.3.4 The WorldFIP fieldbus 9.3.5 The Profibus fieldbus 9.4 Servers and operator consoles 9.5 Machine timing and UTC 9.5.1 Central beam and cycle management 9.5.2 Timing generation, transmission and reception 9.5.3 UTC for LHC time stamping 9.5.4 UTC generation, transmission and reception 9.5.5 NTP time protocol 9.6 Data management 9.6.1 Offline and online data repositories 9.6.2 Electrical circuits 9.6.3 Control system configuration 9.7 Communication and software frameworks 9.7.1 FEC software framework 9.7.2 Controls Middleware 9.7.3 Device access model 9.7.4 Messaging model 9.7.5 The J2EE framework for machine control 9.7.6 The UNICOS framework for industrial controls 9.7.7 The UNICOS object model 9.8 Control room software 9.8.1 Software for LHC beam operation 9.8.2 Software requirements 9.8.3 The software development process 9.8.4 Software for LHC Industrial Systems 9.9 Services for operations 9.9.1 Analogue signals transmission 9.9.2 Alarms 9.9.3 Logging 9.9.4 Post mortem 10 Beam dumping 10.1 System and main parameters 13 LHC as an ion collider 13.1 LHC parameters for lead ions 13.1.1 Nominal ion scheme 13.1.2 Early ion scheme 13.2 Orbits and optical configurations for heavy ions 13.3 Longitudinal dynamics 13.4 Effects of nuclear interactions on the LHC and its beams 13.5 Intra-beam scattering 13.6 Synchrotron radiation from lead ions LHC machine acronyms Bibliography-vi-2008 JINST 3 S08001 Chapter 1 2008 JINST 3 S08001 2.2.7 Collective beam instabilities The interaction of the charged particles in each beam with each other via electromagnetic fields and the conducting boundaries of the vacuum system can result in collective beam instabilities. Generally speaking, the collective effects are a function of the vacuum system geometry and its surface properties. They are usually proportional to the beam currents and can therefore limit the maximum attainable beam intensities. 2.2.8 Luminosity lifetime The luminosity in the LHC is not constant over a physics run, but decays due to the degradation of intensities and emittances of the circulating beams. The main cause of the luminosity decay during nominal LHC operation is the beam loss from collisions. The initial decay time of the bunch intensity, due to this effect, is:

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Section: Synchrotron Radiation From Lead Ionsmentioning

confidence: 99%

LHC Machine

Evans¹,

Bryant²

2008

J. Inst.

1,797

1,344

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“…They generate an oscillating field in beam direction with frequencies ∼50kHz with a solenoid around the axis of the beam. In particle physics, coils are used for precise manipulations of trajectories of charged particles with superconductors, such as in particle accelerators [22] or in hadron cancer therapy [23].…”

Section: Srmentioning

confidence: 99%

Development and perfomance of a miniaturised spin rotator suitable for neutron interferometer experiments

et al. 2019

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A miniaturised versatile spin rotator for application in neutron interferometer experiments is developed. The coil design without material in the beam path allows for a magnetic field adjustable to an arbitrary direction perpendicular to the neutron beam. The field simulations show a homogeneous field over the beam cross-section of 8 mm×5 mm and a field transition 20 mm from inside to outside. The performance of the fabricated miniaturised coil was quantified by carrying out the polarimeter experiment of Demirel et al (New J. Phys., 17:023065, 2015) regarding spin-rotation coupling. The high efficiency spin manipulations by the implemented rotating magnetic field results in a linear dependence between the phase shift and the rotation frequency. In near future, the spin rotator will be used to investigate spin-rotation coupling in a related interferometer experiment.

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“…After minimization, the allowed multipole ratios b 3 ; b 5 ; b 7 , and b 9 have strengths ~10 À4 . In the design of actual magnets, [28] a need for high precision field quality may require that allowed multipoles higher than b 9 are also minimized. In addition, the conductor may have to be described in terms of individual turns of the cable separated by the appropriate insulation thickness, instead of the continuous conductor blocks used here.…”

mentioning

confidence: 99%

Numerical methods

2023

Principles of Magnetostatics

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Superconducting magnets for the CBA project

Cited by 18 publications

References 9 publications

LHC Machine

LHC Machine

Development and perfomance of a miniaturised spin rotator suitable for neutron interferometer experiments

Numerical methods

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