CLASSE

1 Georg H. Hoffstaetter Research Opportunity Night November 3, 2017

Research opportunities in Accelerator Physics

Georg Hoffstaetter, ERL accelerator group

Superconducting Energy Recovery Linac (in construction)

Georg H. Hoffstaetter Research Opportunity Night November 03, 2017

CLASSE

2

Domains of accelerator types

Synchrotron: Repetitive acceleration to high energy, low repetition rate and therefore low current. High energy, low current, relatively large beam size è Fixed target experiments,

Storage rings: Rare filling at high energy and storage for millions of turns, high current, requires very low loss rates. High energy, high current, relatively large beam size è Internal target experiments Linacs: Linear acceleration to moderately high energies that are limited by the available length. Current*Energy is limited by the available power. Moderately high energies, low current, small beam size è Fixed target experiments, moderately

Cornell’s 12GeV Synchrotron And Cornell’s storage ring CESR

Georg H. Hoffstaetter Research Opportunity Night November 03, 2017

CLASSE

3

Energy Recovery Linacs (ERLs)

approx. 500m

●  Produce beam powers, and currents typical of synchrotrons. simultaneously ●  Produce beam quality (density and brightness) of linacs.

Store energy in superconducting cavities while using electrons once.

CLASSE

4 Georg H. Hoffstaetter Research Opportunity Night November 3, 2017

High-Power ERL to prototype Nuclear-Physics colliders and FELs

6 MeV 6 MeV

+/- 36 MeV

42, 78, 114, 150 MeV

Superconducting Energy Recovery Linac (in construction)

Existing world record high brightness linac

Existing world record DC electron gun Existing beam stop New high-current linac

Georg H. Hoffstaetter Research Opportunity Night November 03, 2017

CLASSE

5

Bunche dynamics in 3D field maps

CLASSE

6 Georg H. Hoffstaetter Research Opportunity Night November 3, 2017

Single particle nonlinear dynamics

(ex. of undergrad honors thesis)

Multi particle beam dynamics

Coherent effects,

i.e. of many particles together (PhD)

Interaction of the beam

and environment (PhD)

Accelerator design, planning,

construction, and operation

Ex.: coupler kick

Ex.: intra beam scattering

Ex.: wake fields

0 1

1

0

mm

mm

Ex.: Coherent Synchrotron Radiation

Ex.: the Cornell FFAG ERL

PhD project: Particle- Beam effects in CBETA

CLASSE

7 Georg H. Hoffstaetter Research Opportunity Night November 3, 2017

Building a High-Power ERL accelerator at Cornell

6 MeV 6 MeV

+/- 36 MeV

42, 78, 114, 150 MeV

Superconducting Energy Recovery Linac (in construction)

Existing world record high brightness linac

Existing world record DC electron gun Existing beam stop New high-current linac

Georg H. Hoffstaetter Research Opportunity Night November 03, 2017

CLASSE

8

Conclusion

•  Help us design, build, study and operate this new kind of particle accelerator.

•  ERL group meeting: Thursdays, 4pm, 383 Wilson lab (WebEx meeting with collaborators at Brookhaven National Laboratory)