Topical Workshop on Instabilities, Impedance and Collective Effects 2014 (TWIICE2014)

Session

CSR Instabilities

14

17 Jan 2014, 13:20

Synchrotron SOLEIL

Description

Chairman: Godehard WUESTEFELD (BESSY)

35. Review of CSR Instabilities

Karl BANE (SLAC)

17/01/2014, 13:20

(Review)

36. Recent developments on CSR instability measurements at the ANKA storage ring

Anke-Susanne Mueller (Max-Planck-Gesellschaft (DE))

17/01/2014, 13:55

In the past year, several new additions to the beam diagnostics facilities available at the ANKA storage ring have opened new windows to the study of the CSR instability. A detection system consisting of an ultra-fast superconducting THz detector and data acquisition system, for example, was used to investigate correlations visible on the CSR bursting pattern and to study the interactions...

37. CSR-driven longitudinal instability-comparison of theorical and experimental results

Peter KUSKE (BESSY II)

17/01/2014, 14:15

The predictions of numerical solutions of the Vlasov-Fokker-Planck equation for the interaction of electrons moving and radiating on a circle between two perfectly conducting and infinite plates are compared with observations at rings like BESSY II, MLS, ANKA. Comparison is also made with theoretical results obtained for more realistic models of the vacuum chamber which take into account the...

38. Measurement of THz bursting thresholds at the Metrology Light Source

Markus Ries (Helmholtz-Zentrum Berlin)

17/01/2014, 14:35

The Metrology Light Source (MLS) of the Physikalisch-Technische Bundesanstalt (PTB) is able to vary the zero current bunch length over more than two orders of magnitude. Bunch length manipulation can be achieved by adjusting momentum compaction factor, RF-cavity voltage as well as electron energy. The MLS is able to control the three leading orders of the momentum compaction factor and is...

39. Scaling Law of Coherent Synchrotron Radiation in Rectangular Chamber

Yunhai Cai (SLAC)

17/01/2014, 14:55

We study the threshold of longitudinal instability driven by coherent synchrotron radiation in a rectangular chamber in electron storage rings. Starting with Maxwell’s equation, we first derive a point-charge wakefield for longitudinal motion. Then we use the wake, along with the Vlasov-Fokker-Planck equation, to show that the threshold can be described by a simple scaling law of ξ = ξth(χ,...

7. Comparison simulations-measurements of Single Bunch instabilities at DIAMOND

Dr Riccardo Bartolini (Diamond Light Source and John Adams Institute)

17/01/2014, 15:15

45. Dynamics of the microbunching instabilities: studies at PhLAM laboratory in relation with experiments at UVSOR and SOLEIL

Eléonore ROUSSEL (PhLAM)

17/01/2014, 15:35

We present numerical studies the microbunching instability (MBI) in connexion with experiments performed at UVSOR-II and SOLEIL. The focus is made on the spontaneous MBI at SOLEIL, and on laser-induced seeding of the MBI at UVSOR-II. We compare experimental and numerical data using a modeling based on the Vlasov-Fokker-Planck approach. Recent numerical calculations (since mid-2012) were made...