EnEfficient RF Sources Workshop. June 2014 I. Syratchev

X-band high RF power testing activity at CERNI .Syratchev

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

CLIC Project Implementation Plan 2012-16S. Steinar, https://indico.cern.ch/conferenceDisplay.py?confId=239376

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

XBOX1In operation

XBOX2Under installaton

XBOX3In reparation

PS cafeteria

XBOXRF lab

XBOX’es on the CERN map

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

XBOX1 is up and running for almost 2 years

TD26R05CC

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

XBOX1 operator displays

Automatically controls incident power to structure.Short term: +10kW steps every 6 min and -10kW per BD event.Long Term: Measures BDR (1MPulse moving avg.) and will stop power increase if BDR too high.

Intelligent LLRF control and acquisition system: Automatized structure conditioning protocol provides operation at the

prescribed saturated breakdown trip rate. Online adjustment of the PC individual cavities frequencies to guaranty

low reflection and flat top of the compressed pulse. Logging all breakdown events and other conditioning statuses.

Core XBOX1 gamers:Ben Woolley (PhD. Lancaster)Alberto Degiovanni (Fellow, CERN)Joseph Tagg (Eng. ‘National instruments’/CERN)

Technical support:Luka Timeo (CERN)Stephane Rey (CERN)

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

100 MV/m

Full-fledged CLIC accelerating structure TD26R05CC build by CERN is successfully processed in XBOX1 up to 107 MW/m unloaded accelerating gradient at 250 ns pulses . We have started now study of breakdown rate evolution at the fixed (100 MV/m) gradient.

CLIC

XBOX1

05.12.2013

~7x10-

5 BrD/p

ulse

~2x10-5 BrD/pulse

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

The first commercial (CPI) 50 MW 12 GHz klystron is now in operation in XBOX#1

As it looked like during the commissioning at SLAC…

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

And now at XBOX#1…

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

CPI#1 klystron recent processing history

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

XBOX 2

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

Klystron XL5 RF pulse compressor Inside of the test bunker

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

PXI (LabVIEW) based LLRF fox XBOX2 is validated and available

Glossary: PXI - PCI eXtensions for Instrumentation PCI - Peripheral Component Interconnect

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

XBOX 3…an intelligent way to convert repetition rate into greater number of testing slots…

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

Klystrons commutation using LLRF phase triggers.

By RF phase manipulation of klystrons (each running at 400 Hz) we can established 4 testing slots running at 100 Hz each.

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

3.5 µs -> 400 ns

1

2

V1

V2

PhM

AM

PC, Q0=1.77x105

Load

Pow

er

Time, ns

SimulationMeasured Phase

modulation

Phase-to amplitude modulation

Making CLIC pulse shape with two klystrons

Incident phase modulation

Incident amplitude modulation

Compressed pulse

Manipulating the RF pulse using phase modulation of the klystrons pair and Pulse Compression.

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

• 4 turn-key 6 MW, 11.9942 GHz power stations (klystron/modulator) have been ordered from industry.

• The first unit is scheduled to arrive at CERN in October 2014. The full delivery will be completed before July 2015.

Peak power: 6 MWBeam Voltage: 150 kVBeam current: 90 AAverage power: 12.4 kWEfficiency: 47.5%

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

Modified K1 ScandiNova modulator

Modulator parameters (max.) for 6 MW Toshiba klystron

Peak RF power: 8.0 MWPulsed voltage: 175 kVPulse current: 115 AAverage power: 50 kWPulse length (flat): 5secRep. rate: 400 HZ

1.6 m

1.3m

Doubled width oil tank. To facilitate installation of the Toshiba klystron which has rather wide ( 0.7 m) solenoid.

Additional cabinet (comes for free). It can be used for Klystron RF driver amplifier, Solenoid PS, Ion Pump PS etc.

New Control System that will simplify integration of external parts and offer a lot of new features.

Flexible design (klystrons positioning) to minimize the length of RF waveguide circuit:

The illustration of new 2 cabinet concept that will be adopted for 6 MW Toshiba klystrons.

EnEfficient RF Sources Workshop. June 2014 I. Syratchev

3D layout/integration of XBOX3