IPAC2021 - List of Authors (Christou, C.)

Paper	Title	Page
MOPAB071	Progress with the Booster Design for the Diamond-II Upgrade	286
	I.P.S. Martin, C. Christou, M.P. Cox, R.T. Fielder, J. Kallestrup, A. Shahveh, W. Tizzano DLS, Oxfordshire, United Kingdom A.D. Brynes, J.K. Jones, B.D. Muratori, H.L. Owen STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	Efficient injection into the Diamond-II storage ring [, ] will require an emittance and bunch length substantially below the values produced from the existing booster. Whilst an earlier design for a replacement based on TME cells was able to meet the target values of <30 nm.rad and <40 ps respectively [, *], several technical constraints have led to a rethink of this solution. The revised booster lattice utilises a larger number of cells based on combined-function magnets with lower peak fields that still meets the emittance and bunch length goals. In addition, the new ring has been designed to have low impedance to maximise the extracted charge per shot. In this paper we describe the main features of the lattice, present the status of the engineering design and quantify the expected performance. Diamond-II Conceptual Design Report, Diamond Light Source H. Ghasem et al, these proceedings I. Martin, R. Bartolini, J.Phys.:Conf. Ser., 1067, 032005 ***I. Martin et al, IPAC 2019, WEPMP042
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB071
About •	paper received ※ 18 May 2021 paper accepted ※ 31 May 2021 issue date ※ 02 September 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB107	RF Plans for the Diamond-II Upgrade	391
	C. Christou, P. Gu, P.J. Marten, S.A. Pande, A.F. Rankin DLS, Oxfordshire, United Kingdom
	The RF system for the proposed Diamond-II upgrade will be based on normal-conducting EU HOM-damped cavities powered by high powered solid state amplifiers and controlled by digital low level RF systems built on the microTCA platform. Reasons for these design choices are discussed, and experience of the selected technologies in the Diamond-I ring are reviewed. The storage ring will also include a third harmonic cavity, and the different design options for this device are discussed. RF design of the booster ring is presented, and details are given of an upgraded linac and gun design intended to improve the charge delivered for top-up.
	Poster MOPAB107 [1.703 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB107
About •	paper received ※ 18 May 2021 paper accepted ※ 20 May 2021 issue date ※ 12 August 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Progress with the Booster Design for the Diamond-II Upgrade

286

I.P.S. Martin, C. Christou, M.P. Cox, R.T. Fielder, J. Kallestrup, A. Shahveh, W. Tizzano
DLS, Oxfordshire, United Kingdom
A.D. Brynes, J.K. Jones, B.D. Muratori, H.L. Owen
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

Efficient injection into the Diamond-II storage ring [*, **] will require an emittance and bunch length substantially below the values produced from the existing booster. Whilst an earlier design for a replacement based on TME cells was able to meet the target values of <30 nm.rad and <40 ps respectively [***, ****], several technical constraints have led to a rethink of this solution. The revised booster lattice utilises a larger number of cells based on combined-function magnets with lower peak fields that still meets the emittance and bunch length goals. In addition, the new ring has been designed to have low impedance to maximise the extracted charge per shot. In this paper we describe the main features of the lattice, present the status of the engineering design and quantify the expected performance.
*Diamond-II Conceptual Design Report, Diamond Light Source
**H. Ghasem et al, these proceedings
***I. Martin, R. Bartolini, J.Phys.:Conf. Ser., 1067, 032005
****I. Martin et al, IPAC 2019, WEPMP042

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB071

About •

paper received ※ 18 May 2021 paper accepted ※ 31 May 2021 issue date ※ 02 September 2021

Export •

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

MOPAB107

RF Plans for the Diamond-II Upgrade

391

C. Christou, P. Gu, P.J. Marten, S.A. Pande, A.F. Rankin
DLS, Oxfordshire, United Kingdom

The RF system for the proposed Diamond-II upgrade will be based on normal-conducting EU HOM-damped cavities powered by high powered solid state amplifiers and controlled by digital low level RF systems built on the microTCA platform. Reasons for these design choices are discussed, and experience of the selected technologies in the Diamond-I ring are reviewed. The storage ring will also include a third harmonic cavity, and the different design options for this device are discussed. RF design of the booster ring is presented, and details are given of an upgraded linac and gun design intended to improve the charge delivered for top-up.

Poster MOPAB107 [1.703 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB107

About •

paper received ※ 18 May 2021 paper accepted ※ 20 May 2021 issue date ※ 12 August 2021

Export •

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