CLIC Web>Accelerator>DampingRings (2013-06-17, FanouriaAntoniou)

CLIC DR collaboration page

This is a page for exchange information on the CLIC Damping Rings (DR) and Pre-Damping Rings (PDR) between the CLIC DR group.

Feel free to edit or add additional informations. In order to edit the page is necessary to register at Registration using CERN credential. External user may get an account going to the External account registration.

Pre-damping Rings parameters

Parameter [Unit]	Value (2GHz)	Value (1GHz)
Energy [GeV]	2.86
Circunference [m]	389.15
Number of trains	1	2
Bunches per train	312	156
Bunch spacing [ns]	0.5	1
Bunch population [10⁹]	4.5
Basic cell type	TME
Number of dipoles	38
Dipole field [T]	1.2
Transverse tunes (h/v)	16.39/12.26
Synchrotron tune	0.071	0.051
Natural chromaticity (h/v)	-19.0/-22.9
Norm. equilib. Hor. Emittance [mm mrad]	54
Damping times (h/v/l) [ms]	2.7/2.7/1.3
Mom. compaction factor [10^-3]	3.72
Energy loss per turn [MeV]	2.75
Harmonic Number	2596	1298
RF Frequency [GHz]	2	1
RF Voltage [MV]	10
RF acceptance [%]	1.2	1.7
Equil. energy spread (rms) [%]	0.1
Equil. bunch length (rms) [mm]	3.2	4.6
Number of wigglers	36
Wiggler peak field [T]	1.9
Wiggler length [m]	3
Wiggler period [cm]	30

Lattice files

Current lattice: PDR-ACE-1GHz.seq

Damping Rings parameters

Parameter [Unit]	Value (2GHz)	Value (1GHz)
Energy [GeV]	2.86
Circunference [m]	427.5
Number of trains	1	2
Bunches per train	312	156
Bunch spacing [ns]	0.5	1
Bunch population [10⁹]	4.07
Basic cell type	TME
Number of dipoles	100
Dipole field [T]	1.0
Transverse tunes (h/v)	48.38/10.39
Synchrotron tune	0.0065	0.0057
Natural chromaticity (h/v)	-115/-85
Norm. H/V Emittance (including IBS) [nm.rad]	472/4.8	456/4.8
Damping times (h/v/l) [ms]	2.0/2.0/1.0
Mom. compaction factor [10^-4]	1.3
Energy loss per turn [MeV]	3.98
Harmonic Number	2851	1425
RF Frequency [GHz]	2	1
RF Voltage [MV]	4.5	5.1
RF acceptance [%]	1.0	2.4
RMS energy spread (including IBS) [%]	0.1
RMS bunch length (including IBS) [mm]	1.6	1.8
Number of wigglers	52
Wiggler peak field [T]	2.5
Wiggler length [m]	2
Wiggler period [cm]	5

Lattice files

Current lattice: DR_CDR_1GHz.seq

Magnet Lists

MagnetLists.xls: Magnet lists for DR and PDR

Software tools

The lattice design tool used is MadX, available from http://mad.web.cern.ch/mad/. MadX produces as output

a flat lattice description in a madx input language (.seq files). No drift, no lines, basically a set of variables and element declaration and a sequence of elements with their s position.
a flat table file (.tfs files) that includes either element parameters (including drifts) and optics function or element name and assigned magnetic error and misalignments.

People and their main interests

Y. Papaphilippou, CERN, Design coordination, lattice, non-linear dynamics
G. Rumolo, CERN, Collective effects
H. Schmickler, CERN, CLIC Technical systems activity leader
D. Schulte, CERN, CLIC Beam dynamics activity leader
A. Grudiev, CERN, RF design
F. Antoniou, CERN and NTUA, Pre-damping ring design, lattice design, Intrabeam Scattering
E. Koukovini-Platia, CERN and EPFL, Impedance budgets, instability simulations
Y. Renier, Non-linear dynamics
A. Vivoli, CERN, Intrabeam Scattering simulations
P. Zisopoulos, CERN and UoA, Delay loop design
E. Levichev, BINP, Lattice design, space charge
D. Shatilov, BINP, Lattice design, space charge
S. Siniatkin, BINP, Lattice design, space charge
S. Piminov, BINP, Lattice design, space charge
D. Schoerling, CERN and TUBF, Wiggler design
A. Bernhard, KIT, Wiggler design
A. Bragin,BINP, Wiggler design
M. Karppinen, CERN, Wiggler design
R. Maccaferri,CERN (retired), Wiggler design
P. Peiffer, KIT, Wiggler design 3
R. Rossmanith, KIT (retired), Wiggler design
S. Russenschuck, CERN, Wiggler design
P. Vobly, BINP, Magnet and wiggler design
K. Zolotarev, BINP, Wiggler design, absorption systems
M. Modena, CERN, Magnet design
A. Perin, CERN, Cryogenics
M. Barnes, CERN, Kicker systems
S. Calatroni, CERN, Chamber coatings
P. Chiggiatto, CERN, Vacuum technology, coatings
T. Lefevre, CERN, Beam instrumentation
G. Vandoni, CERN, Vacuum
F. Zimmermann, CERN, Coherent Synchrotron Radiation
K. Wooton, ACAS, Low emittance tuning
B. Godard, CERN, Beam transfer systems
F. Toral, CIEMAT, Kicker design
M. Palmer, Cornell, CESRTA experiments
A. Faus-Golfe, IFIC-Valencia, Kicker design
A. Anderson, Maxlab, Emittance monitor
M. Boege, PSI, SLS experiments, (TIARA-SVET)
A. Streun, PSI, SLS experiments, (TIARA-SVET)

References and usefull links

CLIC Damping Rings WG meetings: http://indico.cern.ch/categoryDisplay.py?categId=2314

CLIC Damping Rings presentations on the 6th ACE, 2-4 Feb. 2011:
- Damping ring issues – overall optimization, low emittance tuning, other beam tests, Yannis Papaphilippou: http://indico.cern.ch/materialDisplay.py?contribId=42&materialId=slides&confId=115921
- Damping ring issues – RF system, Alexej Grudiev: http://indico.cern.ch/materialDisplay.py?contribId=44&materialId=slides&confId=115921
- Damping ring issues – collective effects and vacuum components, Giovanni Rumolo: http://indico.cern.ch/getFile.py/access?contribId=46&resId=0&materialId=slides&confId=115921

Beam Physics meeting 20 April 2011
- Status of the CLIC Damping Rings - Optics and IBS studies, F. Antoniou: http://indico.cern.ch/conferenceDisplay.py?confId=136172

Low Emittance Rings Workshop - LER2010, 12-15 Jan. 2010: http://ler2010.web.cern.ch/LER2010/

Low Emittance Rings Workshop - LOWeRING 2011, 03-05 Oct. 2011: http://lowering2011.web.cern.ch/lowering2011/

Test Infrastructure and Accelerator Research Area (TIARA) - Preparatory phase: http://www.eu-tiara.eu/information/index.php?id=13
- WP6: SVET R&D Infrastructure: http://www.eu-tiara.eu/rtd/index.php?id=42

Design, construction and experimental program for CLIC damping wiggler: http://indico.cern.ch/conferenceDisplay.py?confId=111714

CLIC_PDR_Overview.pdf: CLIC Pre-damping Rings Overview, F. Antoniou

P.Zisopoulos-16052012.pdf: Isochronicity conditions for the CLIC DR Delay Ring, P. Zisopoulos

DR_CDR_1GHz.seq: DR lattice for the 1GHz option (CDR version)

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	CLIC_PDR_Overview.pdf	r1	manage	1251.5 K	2011-04-27 - 14:54	FanouriaAntoniou	CLIC Pre-damping Rings Overview, F. Antoniou
seq	DR_CDR_1GHz.seq	r2 r1	manage	132.5 K	2013-01-29 - 10:55	FanouriaAntoniou	DR lattice for the 1GHz option (CDR version)
xls	MagnetLists.xls	r1	manage	17.0 K	2011-04-27 - 15:11	FanouriaAntoniou	Magnet lists for DR and PDR
pdf	P.Zisopoulos-16052012.pdf	r1	manage	1719.2 K	2012-05-30 - 08:57	FanouriaAntoniou	Isochronicity conditions for the CLIC DR Delay Ring, P. Zisopoulos
seq	PDR-ACE-1GHz.seq	r1	manage	34.3 K	2011-04-27 - 15:06	FanouriaAntoniou

Topic revision: r13 - 2013-06-17 - FanouriaAntoniou

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