IPAC2016 - List of Authors (Hammond, N.P.)

Paper	Title	Page
WEPOW047	A Hybrid Superconducting/Normal Conducting RF System for the Diamond Light Source Storage Ring	2950
	C. Christou, A.G. Day, P. Gu, N.P. Hammond, J. Kay, M. Maddock, P.J. Marten, S.A. Pande, A.F. Rankin, D. Spink DLS, Oxfordshire, United Kingdom
	300 mA beam in the Diamond Light Source storage ring is presently maintained by two 500 MHz superconducting CESR-B cavities. Cavity reliability is acceptable at modest operating voltages up to 1.4 MV per cavity but falls off rapidly beyond this value. The installation of an extra cavity or cavities would reduce the voltage demand on the current superconducting cavities and also the operating power level of the high power amplifiers, with commensurate improvement in machine reliability. Furthermore, two superconducting cavity failures in recent years have resulted in machine down-time and reduced-current operation and repair has proven to be prolonged and expensive. It is therefore planned to install two normal conducting cavities into the ring to support operation of the superconducting cavities and to act as a safeguard against any future superconducting cavity failures. Details are presented in this paper of plans and progress towards the installation of the hybrid RF system.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW047
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WEPOW048	Preparations for the Double Double Bend Achromat Installation in Diamond Light Source	2953
	R.P. Walker, C.A. Abraham, C.P. Bailey, R. Bartolini, P. Coll, M.P. Cox, N.P. Hammond, M.T. Heron, S.E. Hughes, J. Kay, I.P.S. Martin, S.P. Mhaskar, A.G. Miller, A.J. Reed, G. Rehm, E.C.M. Rial, A.J. Rose, A. Shahveh, H.S. Shiers, A. Thomson DLS, Oxfordshire, United Kingdom R. Bartolini JAI, Oxford, United Kingdom
	We present the status of preparations for a major installation in the Diamond storage ring which is due to take place in 2016, namely the conversion of one cell of the ring from a double bend achromat (DBA) structure, to a double-DBA, or DDBA. We present results of measurements of the new narrow bore, high strength, quadrupoles and sextupoles, as well as the four new gradient dipoles. Fabrication of entirely new narrow-gap vacuum vessel strings, a mixture of copper and stainless steel is also described. The status of assembly of the two 7m long girders is presented, as well as other preparatory engineering, power supply, controls and high level software work.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW048
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A Hybrid Superconducting/Normal Conducting RF System for the Diamond Light Source Storage Ring

2950

C. Christou, A.G. Day, P. Gu, N.P. Hammond, J. Kay, M. Maddock, P.J. Marten, S.A. Pande, A.F. Rankin, D. Spink
DLS, Oxfordshire, United Kingdom

300 mA beam in the Diamond Light Source storage ring is presently maintained by two 500 MHz superconducting CESR-B cavities. Cavity reliability is acceptable at modest operating voltages up to 1.4 MV per cavity but falls off rapidly beyond this value. The installation of an extra cavity or cavities would reduce the voltage demand on the current superconducting cavities and also the operating power level of the high power amplifiers, with commensurate improvement in machine reliability. Furthermore, two superconducting cavity failures in recent years have resulted in machine down-time and reduced-current operation and repair has proven to be prolonged and expensive. It is therefore planned to install two normal conducting cavities into the ring to support operation of the superconducting cavities and to act as a safeguard against any future superconducting cavity failures. Details are presented in this paper of plans and progress towards the installation of the hybrid RF system.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW047

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPOW048

Preparations for the Double Double Bend Achromat Installation in Diamond Light Source

2953

R.P. Walker, C.A. Abraham, C.P. Bailey, R. Bartolini, P. Coll, M.P. Cox, N.P. Hammond, M.T. Heron, S.E. Hughes, J. Kay, I.P.S. Martin, S.P. Mhaskar, A.G. Miller, A.J. Reed, G. Rehm, E.C.M. Rial, A.J. Rose, A. Shahveh, H.S. Shiers, A. Thomson
DLS, Oxfordshire, United Kingdom
R. Bartolini
JAI, Oxford, United Kingdom

We present the status of preparations for a major installation in the Diamond storage ring which is due to take place in 2016, namely the conversion of one cell of the ring from a double bend achromat (DBA) structure, to a double-DBA, or DDBA. We present results of measurements of the new narrow bore, high strength, quadrupoles and sextupoles, as well as the four new gradient dipoles. Fabrication of entirely new narrow-gap vacuum vessel strings, a mixture of copper and stainless steel is also described. The status of assembly of the two 7m long girders is presented, as well as other preparatory engineering, power supply, controls and high level software work.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW048

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)