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Precision X-band RF control system. 2019 LLRF Workshop, Chicago Sept. 29 - Oct. 03, 2019 Matthias Reukauff Chicago, Oct. 01, 2019 New Cavity: PolariX TDS Polarizable X-band Transverse Deflecting Structure Resonance frequency: 12 GHz

SLIDE 1

Precision X-band RF control system.

2019 LLRF Workshop, Chicago

Sept. 29 - Oct. 03, 2019

Matthias Reukauff Chicago, Oct. 01, 2019

SLIDE 2

Page 2

New Cavity: PolariX TDS

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

Polarizable X-band Transverse Deflecting Structure
Resonance frequency: 12 GHz
 New RF frontend required
Idea: Reuse existing 3 GHz LLRF system

SLIDE 3

Page 3

New Cavity: PolariX TDS

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

Polarizable X-band Transverse Deflecting Structure
Resonance frequency: 12 GHz
 New RF frontend required
Idea: Reuse existing 3 GHz LLRF system

(DWC8VM1 + SIS8300L)

RF Ref.

3 GHz

LO Generation MicroTCA.4 S-Band LLRF

Used i.e. at REGAE (XFEL / FLASH)

12 GHz 3 GHz

Klystron PolariX

Middleware needed

SLIDE 4

Page 4

New Cavity: PolariX TDS

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

Polarizable X-band Transverse Deflecting Structure
Resonance frequency: 12 GHz
 New RF frontend required
Idea: Reuse existing 3 GHz LLRF system

(DWC8VM1 + SIS8300L)

RF Ref.

3 GHz

LO Generation MicroTCA.4 S-Band LLRF

Used i.e. at REGAE (XFEL / FLASH)

12 GHz 3 GHz

Klystron PolariX

12 GHz 3 GHz

X-to-S-Band Down-/Up-converter

… …

Middleware needed

X-LO Generation

9 GHz

SLIDE 5

Page 5

How We Do It

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

RF Ref.

3 GHz 9 GHz

Frequency Tripler Cavity BPF LNA LO Distribution X-band LO Generation Module (XLOGM)

SLIDE 6

Page 6

How We Do It

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

X-band Down-converter Module (XDWCM) PolariX Cavity

12 GHz

LO Mixer MicroTCA.4 LLRF

9 GHz 3 GHz

non-reflective LPF LPF

SLIDE 7

Page 7

What We Achieve…

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

… in the lab

Additive Phase Noise SSB Phase Noise [dBc/Hz] Offset Frequency [Hz] Integrated Timing Jitter RMS Integrated Timing Jitter [fs] Offset Frequency [Hz]

X-band LO Generation

Additive Phase Noise SSB Phase Noise [dBc/Hz] Offset Frequency [Hz] Integrated Timing Jitter RMS Integrated Timing Jitter [fs] Offset Frequency [Hz]

X-band Converters Part Jitter [fs] Jitter [m°] Amplifier 0.911 3.94 Tripler 0.713 3.08 XLOG 1.157 5.00 XDWC 0.444 1.92 XUPC 1.123 4.85 Additive Phase Noise* @ 12 GHz 1 Hz – 10 MHz Bandwidth

*Measured with Rohde & Schwarz FSWP

SLIDE 8

Page 8

It‘s Already Running!

| Precision X-band RF control system | Matthias Reukauff | Oct. 01, 2019

First streaking on 5th September 2019

SLIDE 9

Thank you

SLIDE 10

Contact Deutsches Elektronen-Synchrotron www.desy.de Matthias Reukauff MSK matthias.reukauff@desy.de +49 40 8998 1978