Progress on the superconducting undulator for ANKA and on the instrumentation for R&amp;D

Casalbuoni, S.; Baumbach, Tilo; Grau, Andreas; Hagelstein, M.; Jauregui, D. Saez de; Boffo, C.; Borlein, M.; Walter, Wolfgang; Magerl, A.; Mashkina, Elena; Vassiljev, N

doi:10.1063/1.3463207

Cited by 61 publications

(105 citation statements)

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“…In this paper we present all independent Casimir operators of the VSUSY algebra, an odd vector extension of the four-dimensional Poincaré algebra. This result is the first step towards the classification of the irreducible representations of the algebra, which is currently work in progress [10].…”

Section: Discussionmentioning

confidence: 83%

Vector supersymmetry from OSp(3,2|2): Casimir operators

Casalbuoni

Elmetti²,

Gomis

et al. 2009

Fortschritte der Physik

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In this paper we briefly review the main results obtained in [1], where some algebraic properties of the 'vector supersymmetry' (VSUSY) algebra have been studied. VSUSY is a graded extension of the Poincaré algebra in 4 dimensions with two central charges. We derive all independent Casimir operators of VSUSY and we find two distinct spin-related operators in the case of nonvanishing central charges. One is the analogue of superspin for VSUSY and the other is a new spin, called C-spin, whose value is fixed to 1/2. We also show that the VSUSY algebra and its Casimir operators can be derived by an Inönü-Wigner contraction from OSp(3, 2 |2). This paper is based on the talk given in Varna, Bulgaria, during the 4-th EU RTN Workshop 2008.

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Section: Discussionmentioning

confidence: 83%

Vector supersymmetry from OSp(3,2|2): Casimir operators

Casalbuoni

Elmetti²,

Gomis

et al. 2009

Fortschritte der Physik

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“…The resistance at low temperatures in the first few of material exposed to the beam is an important parameter that determines resistive wall heating losses. The 30 of copper plating resembles the surface seen by the electron beam in the liner used in the ANKA superconducting undulators, made of 300 stainless steel foil with 30 of copper plating [3], [7]. The vacuum system of COLDDIAG consists of two volumes: the isolation vacuum and the beam vacuum (UHV).…”

Section: The Vacuum Chambermentioning

confidence: 99%

“…Mostacci is with Università degli Studi di Roma "La Sapienza," Piazzale Aldo Moro [3]. Studies performed with the cold bore superconducting undulator installed at the synchrotron radiation source ANKA suggest that the main contribution to the beam heat load is due to secondary electron bombardment.…”

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confidence: 99%

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COLDDIAG: A Cold Vacuum Chamber for Diagnostics

Casalbuoni

Baumbach

Gerstl

et al. 2011

IEEE Trans. Appl. Supercond.

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Abstract-One of the still open issues for the development of superconducting insertion devices is the understanding of the heat load induced by the beam passage. With the aim of measuring the beam heat load to a cold bore and in order to gain a deeper understanding in the beam heat load mechanisms, a cold vacuum chamber for diagnostics is under construction. We plan to have access with the same set-up to a number of different diagnostics, so we are implementing: i) retarding field analysers to measure the electron flux, ii) temperature sensors to measure the total heat load, iii) pressure gauges, iv) and mass spectrometers to measure the gas content. The inner vacuum chamber will be removable in order to test different geometries and materials. COLDDIAG is built to fit in a short straight section at ANKA, but we are proposing its installation in different synchrotron light sources with different energies and beam characteristics. A first installation in DIAMOND is planned in June 2011. Here we describe the technical design report of this device and the planned measurements with beam.

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“…Both enhancement or suppression are expected, depending on the helicity structure of the contact term and its sign η q ik . If the CI mass scale is large, the highest sensitivity is expected at experiments with highest energies, but due to the extremely high experimental precision, also atomic parity violation experiments at low energies are sensitive to parity-odd combinations of helicities [10].…”

Section: Contact Interactionsmentioning

confidence: 99%

Beyond the Standard Model at HERA

Spiesberger

New Trends in HERA Physics 1999

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The prospects of physics beyond the standard model in deep inelastic scattering are reviewed, emphasizing the search for contact interactions, for leptoquarks and for supersymmetry with R-parity violation. R-parity violating supersymmetry is explored as a speculative source of events with high energy muons and missing transverse momentum, but no convincing explanation for events of this type observed at H1 is found.

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Progress on the superconducting undulator for ANKA and on the instrumentation for R&D

Cited by 61 publications

References 0 publications

Vector supersymmetry from OSp(3,2|2): Casimir operators

Vector supersymmetry from OSp(3,2|2): Casimir operators

COLDDIAG: A Cold Vacuum Chamber for Diagnostics

Beyond the Standard Model at HERA

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