14 th esls rf meeting – trieste, september 2010 alba rf status 1/28 alba rf status francis perez

14th ESLS RF Meeting – Trieste, September

2010

ALBA RF Status 1/28

ALBA RF StatusFrancis Perez


2010

ALBA RF Status 2/28

The RF Group: Paco Sanchez

Angela Salom

Bea Bravo (since Oct. 2009)

Support Engineering DivisionSupport Computing DivisionSupport Operators Group


2010

ALBA RF Status 3/28

• ALBA overview and status

• Booster RF System

• Storage Ring RF System

• Next


2010

ALBA RF Status 4/28

Synchrotron Light Source in Cerdanyola (Barcelona, Spain)

December 2009


2010

ALBA RF Status 5/28

ALBA Accelerators

LINAC100 Mev

BOOSTER100 MeV – 3 GeV

STORAGE RING3 GeV


2010

ALBA RF Status 6/28

Booster commissioning started:- 2 weeks in January- 2 weeks in July- Afternoons since Monday 27.09

SR installation completed. Some testing of subsystems pending. SR commissioning starts November 2010 without IDs.

SR commissioning with IDs by March 2011

1st beam for beamlines commissioning April 2011


2010

ALBA RF Status 7/28

“Stored Beam 100 MeV”: RF ON

5 seconds,5 injections

BOOSTER COMMISSIONING


2010

ALBA RF Status 8/28

1st Synchrotron Light in Spain

BOOSTER COMMISSIONING


2010

ALBA RF Status 9/28

90 % Energy

and

70% current

of nominal values

2.7 GeV with 0.7 mABOOSTER COMMISSIONING

January 2010


2010

ALBA RF Status 10/28

Booster RF System


2010


Booster Transmitter

Spring 2009:

DC Commissioning (with Thomson)

Oct - Nov 2009:

RF Power Commissioning (with Thomson)

-RF shutter closed and full RF power on load-

SAT passed on November 5th, 2009


2010


Booster Cavity

November 2009:

Cavity installed and aligned

Vacuum OK

Cabling and Sensors installed

Water cooling connected

Air cooling (RF window and WATRAX)

EPS and interlock OK


2010


Booster LLRF: Conditioning and Calibration

Nov – Dec 2009:

Full RF Plant ready Tunnel closed (Operation in parallel with the Bo PS testing) 60 kW in the cavity (35 kW used during Booster commissioning) Calibration done Closed Loop Calibration

0

5

10

15

20

25

30

35

40

45

0 100 200 300 400 500 600

Cavity Voltage [mV]

RF

Po

we

r [k

W]


2010


LLRF: Automatic Start upFeb 2010:

After the experience during the Booster commissioning

To easy the recovery after a trip To avoid operator errors

Automatic Start up:

Stored Beam: RF ON


2010


RF Power

Automatic Start up:

- After a trip LLRF set all parameters to minimum:- Low RF drive- Disable tuning - Open loops (I&Q)

- Operator reset the interlock and switch on the transmitter- LLRF detect the presence of RF power at cavity input- LLRF tune the cavity before allowing high power- LLRF close the loops and check loops stability- Smooth power increase- Message RF ready for beam

Tuning pulses

Plungers direction


2010


Storage Ring RF System


2010


Layout 6 cavities

Dampy

CaCo

IOT

Load

Circulator

Watrax

DigIQAnIQ

Control System

DigitalLLRF

RF Voltage 3600 kV

TRANSMITTER

Tube type IOT

Number 6 x 2 IOTs

Power 2 x 80 kW

Combination CaCo


2010


SR Transmitters

March - September 2010:

RF Commissioning (with Thomson)

12 SR transmitters has passed the SAT

Details by Paco Sanchez


2010


SR Dampy Cavities

April 2009 to January 2010

Dampers flanges temperature behaviour

Dampy 01 - Nov08: T [ºC] = 1,61 P[kW] + 23,2

Dampy 01 to 06, average: T[ºC] = 0,20 P [kW] + 23,6± 0,06 ± 0,5

0

10

20

30

40

50

60

0 10 20 30 40 50 60 70 80 90

Power [kW]

Tem

pera

ture

[ºC

]

Conditioning at RF lab


2010


SR Dampy Cavities

All 6 performing well

Installed and bake-out in situ

Alignment, cabling and cooling ready


2010


Waveguide system: Circulator problemsFerrite Inc. (USA)

Control by minimising the VSWR: - Measure forward and reflected power

- Compute VSWR

- Act on the PS of the circulator

Problems during cavity conditioning:

Pulsed conditioning: No responding due to slow control

CW conditioning: During autotune it changes slightly the IOT load, i.e. IOT power, so sudden increase of power to the cavity and (ussualy) a vacuum trip.


2010


Waveguide system: Circulator problems

Solution:

Condition the cavities with the circulator on Manual Mode(no very convenient, but ok)

In addition we have to send a circulator back to Ferrite since it was wrongly adjusted to cope with 160 kW of power.

Bias current drift


2010


Digital LLRF System

All modules installed:

Analogue Front ends

Amplitude and Phase Control Loop

Tuning loop

Timing system

RF detectors

Arc detector

Fast Interlock Modules (FIM)


2010


Conditioning and Calibration

June – September 2010:

All RF Plants ready Cavities:

Four cavities conditioned up to 70 kW One cavity under conditioning this week Last cavity under cooling reparation (flowmeters)

Calibration on going


2010


NEXT:

Linac RF pulse digitalisation:

…

CaCo improvement:

See Bea presentation

ALBA commissioning:

Linac + Booster + SR + Beamlines


2010


RF Linac Pulses Characteristics RF Frequency: 500MHz & 3GHz

Pulse width: 4μs

Repetition rate: 1Hz – 3Hz

Available RF SignalsFw PB1, FwPB2 & FwB, FwK1 & FwK2, FwAS1 & FwAS2

Linac RF pulse digitalisation


2010


0.5 1 1.5 2 2.5 3 3.5

x 105

0

5

10

15

20

25

30

35

t(ns)

mV

- (

º)

I (mV)

Q(mV)Amp (mV)

Phase(º)

2.66 2.67 2.68 2.69 2.7 2.71

x 105

0

5

10

15

20

25

30

35

t(ns)

mV

- (

º)

Amp (mV)

Phase(º)

Front EndDownconversion of 3GHz signals to 500MHz (IF)LO: 3.5GHz

Digital Board 8 ADCs and Virtex-4 IF signals undersampled at 80MHz Amp & Ph information to CS

Control System (CS)At present: Manual Phase adjustment of RF signals Next Step: Automatic phase adjustment

First Tests (4us pulse)Amp Error: 0.2mVpp

Phase error : 0.6ºpp

2.675 2.68 2.685 2.69 2.695

x 105

33

33.5

34

t(ns)

mV

- (

º)

Amp (mV)

Phase(º)

2.66 2.665 2.67 2.675 2.68 2.685 2.69 2.695 2.7

x 105

4

4.5

5

5.5

6

t(ns)

mV

- (

º)

Amp (mV)

Phase(º)

Pulse 4us Amplitude Resolution

Phase Resolution


2010


Thank you

14 th esls rf meeting – trieste, september 2010 alba rf status 1/28 alba rf status francis perez

Documents