Topical Workshop on Diagnostics for Ultra-Low Emittance Rings (TW-DULER)

Session

Diagnostics for Injector and Top-Up

I&T

19 Apr 2018, 16:00

G59 (Diamond Light Source)

7. Reduction of perturbations at the injection for the ESRF-EBS

Benoît Roche (ESRF)

19/04/2018, 16:00

Oral Contribution

Designing a low emittance ring is generally achieved at the cost of a lower beam lifetime. To ensure a relatively constant current in the ring it is therefore compulsory to use a top-up refill scheme with frequent injections. Unfortunately injections are not completely transparent for users, the pulsed magnets (septa or kickers) induce some perturbation of the beam motion (closed orbit) and...

4. Development and application of the new optical dissector for permanent control of the longitudinal distribution of a beam in cyclic accelerators

Dr Oleg Meshkov (BINP)

19/04/2018, 16:30

Oral Contribution

A dissector is an electron-optical device designed for measurement of periodic light pulses of subnanosecond and picosecond duration. LI-602 dissector developed at BINP is widely used for routine measurements of a longitudinal profile of electron and positron beams at BINP electron-positron colliders and other similar installations. LI-602 provides a temporal resolution of about 20 ps. A new...

2. Turn-by-Turn Measurements for Systematic Investigations of the Micro-Bunching Instability

Edmund Blomley (Karlsruhe Institute of Technology (KIT))

19/04/2018, 17:00

Oral Contribution

While recent diffraction limited storage rings provide bunches with transverse dimensions smaller than the wavelength of the observed synchrotron radiation, this is still challenging in the longitudinal plane. The self interaction of a short electron bunch with its emitted coherent radiation can lead to the micro-bunching instability. Therefore, the bunch compression in storage rings is...

15. Bunch-by-bunch diagnostics at BESSY II

Dr Andreas Schälicke (HZB Berlin, BESSY II)

19/04/2018, 17:30

Oral Contribution

Already now BESSY II is operated with a complex fill pattern, in order to fulfill many different user-demands simultaneously. Thus, properties like current, bunch size and bunch length vary on a bunch-by-bunch level, which require dedicated diagnostics for the stable operation of the machine. With the advent of BESSY VSR, the variable bunch-length storage ring, bunch resolved diagnostics will...