TY  - CONF
AU  - McIntyre, P.M.
AU  - Breitschopf, J.
AU  - Chavez, D.C.V.
AU  - Kellams, J.N.
AU  - Sattarov, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - LHC Doubler: CIC Dipole Technology May Make It Feasible and Affordable
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - There is new physics-driven interest in the concept of an LHC doubler with collision energy of 30 TeV and high luminosity. The cost-driver challenge for its feasibility is the ring of 16 T dual dipoles. Recent developments in cable-in-conduit (CIC) technology offer significant benefit for this purpose. The CIC windings provide robust stress management at the cable level and facilitate forming of the flared ends without degradation. The CIC windings provide a basis for hybrid windings, in which the innermost layers that operate in high field utilize Bi-2212, the center layers utilize Nb₃Sn, and the outer layers utilize NbTi. Cryogen flows through the interior of all cables, so that heat transfer can be optimized throughout the windings. The design of the 18 T dipole and the 23 kA CIC conductor will be presented. Particular challenges for integration in an LHC doubler will be discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 552
EP  - 555
KW  - dipole
KW  - multipole
KW  - collider
KW  - injection
KW  - hadron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP048
UR  - http://jacow.org/ipac2019/papers/mopmp048.pdf
ER  - 

TY  - CONF
AU  - McIntyre, P.M.
AU  - Breitschopf, J.
AU  - Chavez, D.C.V.
AU  - Gerity, J.
AU  - Kellams, J.N.
AU  - Sattarov, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - 6 T Cable-in-conduit Dipole to Double the Ion Energy for JLEIC
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The proposed electron-ion collider JLEIC would make high-luminosity collisions of polarized ions and polarized electrons with electron energy up to 12 GeV and ion energy up to 40 GeV/u. Both the luminosity and the collision energy could be increased by doubling the dipole field in the ion ring from 3 T to 6 T, and the enhanced performance would access the full range of parameters for the physics objectives of the project. The Texas A&M group has developed the large-aperture 3 T dipoles for the baseline project, based upon a novel superconducting cable-in-conduit. (CIC). A closely similar 6 T design is being developed, utilizing a 2-layer CIC. Details of the magnet design and development of the 2-layer CIC will be presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 556
EP  - 558
KW  - dipole
KW  - electron
KW  - collider
KW  - injection
KW  - luminosity
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP049
UR  - http://jacow.org/ipac2019/papers/mopmp049.pdf
ER  - 

TY  - CONF
AU  - McIntyre, P.M.
AU  - Breitschopf, J.
AU  - Gerity, J.
AU  - Kellams, J.N.
AU  - Sattarov, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Micro-aligned Solenoid for Magnetized Bunched-beam Electron Cooling of 100 GeV/u Ions
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Magnetized electron cooling of ion beams requires pre-cise alignment of the electron beam with the equilibrium trajectory of the ion bunch. For the parameters required for JLEIC, a solenoid with bore field ~1 T, length ~30 m, and rms alignment of ~μrad is required. Such precise alignment has never been accomplished in a 1 T solenoid. The design of a micro-aligned solenoid is presented. A gap-separated stack of thin steel washers is located inside the solenoid. The washer stack shields transverse magnet-ic fields from its interior by a factor of ~10. A 30-washer module of the structure was built and measured using ultra-sensitive capacitive probes using a coordinate meas-uring machine. The r.m.s. coplanarity of the washer gaps was measured to be <5 μm, consistent with the required micro-alignment.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 4314
EP  - 4317
KW  - electron
KW  - solenoid
KW  - alignment
KW  - GUI
KW  - collider
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPTS087
UR  - http://jacow.org/ipac2019/papers/thpts087.pdf
ER  -