Status of the ELETTRA RF System Upgrade Activities€¦ · elettra elettra elettra elettra elettra elettra 3 10th ESLS RF Meeting, DELTA Dortmund, Germany - 27th-28th September, 2006

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10th ESLS RF MeetingDELTA, Dortmund, Germany, 27- 28 September 2006

ELETTRA RF UPGRADE - A. Fabris

Alessandro FabrisOn behalf of the ELETTRA RF group

Status of the ELETTRA RF System Upgrade Activities

Introduction

Components

Next Activities

Conclusions

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elettraelettraelettra 10th ESLS RF Meeting, DELTA Dortmund, Germany - 27th-28th September, 2006


Introduction Introduction // Components / Next Activities / ConclusionsComponents / Next Activities / Conclusions

TARGET OF THE RF UPGRADE PROJECT:Provide the RF system with the necessary operating margins, when all IDs

are operational (with a slight improvement also in beam lifetime). Increase available RF power in view of possible increase of beam current and

energy.

PROJECT WAS RE-STARTED IN MAY 2005 FOLLOWING THE AVAILABILITY OF FUNDS.

DESIGN STRATEGY:Minimum interference with machine operation.

Gradual approach.No increase of the space for RF components in the machine.

Same number of cavities.No sc cavities.

Consistency with other upgrades of the facility.Take benefit of working in the UHF band.

Use as much as possible solutions adopted in broadcast applications.

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Introduction Introduction // Components / Activities / ConclusionsComponents / Activities / Conclusions

MULTI-STAGE APPROACHPHASE A: upgrade one 60 kW plant to 150 kW.PHASE B: repeat phase A on another plant.PHASE C: upgrade the two remaining plants in the same way.At the end of phase C, the available RF power will be 600 kW.

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60 kW

9: New ELETTRAcavity

2,3,8: Existing cavities

Sections 2 e 3 Section 8 Section 9

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60 kW

8

60 kW

9

150 kW

Storage ringPHASE A IS NOW IN THE CONSTRUCTION PHASE

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Components :Components : Amplifier Amplifier / Power Transmission / Installations/ Power Transmission / Installations

The Power Amplifier is made combining two 80 kW transmitters providing 150 kW at the amplifier output.

It has been acquired as a turn-key system from industry (ELECTROSYS, Orvieto Italy).

The final stage of each transmitter is a 80 kW IOT (TH793 from THALES). The use of other tubes assemblies could eventually be possible by use of a replacement kit.

The outputs of the two transmitters are combined by means of a switchless combiner.

Each transmitter can work standalone, thus increasing operational flexibility. The fault or the maintenance of one transmitter does not imply the interruption of the operation of the plant, since the other transmitter continues to operate.

ϕ

Singletransmitter

Combiner

Splitter

RF out

RF in

Singletransmitter

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Courtesy of Electrosys

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The HV power supply of each IOT is a switched mode power supply.

The structure is more compact.Lower residual ripple.Beam voltage is stabilised independently of:

Output power variations.Mains input variations.

If needed, switching frequency can be adjusted in the range 16 to 21 kHz.No oil capacitors or transformers are used.No crowbar tube.

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Components :Components : Amplifier Amplifier / / Power TransmissionPower Transmission / Installations/ Installations

The power amplifier is protected by a 200 kW 500 MHz circulator ordered to AFT (Germany).Power transmission is done with WR1800 waveguides. The waveguide

components have been ordered to MEGA Industries (USA).Dummy loads have been ordered to FERRITE (Russia).

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Components :Components : AmplifierAmplifier / Power Transmission / / Power Transmission / InstallationsInstallations

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Installations have to fit in the planned shutdown.2006 operation calendar has been

planned taking care of planned deliveries.Program of concluded activities:

February and April shutdowns: preparatory activities.Summer shutdown (June- half July

2006 ): amplifier and circulator installation.August shutdown: completion of

installations and tests.From August: plant commissioning

on dummy load.

Jan M L N Feb M L N Mar M L N Apr M L N May M L N Jun M L N1 1 1 1 1 12 2 2 2 2 23 3 3 3 3 34 4 4 4 4 RUN 101 45 5 5 5 5 56 6 6 6 6 67 7 7 7 7 78 8 RUN 99 8 8 8 89 9 9 9 9 9

10 10 10 10 10 1011 11 11 11 11 1112 12 12 12 12 1213 13 13 RUN 100 13 13 1314 14 14 14 14 1415 15 15 15 15 1516 16 16 16 16 1617 17 17 17 17 1718 RUN 99 18 18 18 18 1819 19 19 19 19 1920 20 20 Hercules 20 20 2021 21 21 Hercules 21 21 2122 22 22 Hercules 22 22 2223 23 23 Hercules 23 23 2324 24 24 24 24 2425 25 25 25 25 2526 26 26 26 RUN 101 26 2627 27 27 27 27 OPEN DAY 2728 28 28 28 28 2829 29 29 29 2930 30 30 30 3031 31 31

Jul M L N Aug M L N Sep M L N Oct M L N Nov M L N Dec M L N

1 1 1 1 1 12 2 2 2 2 23 3 3 3 3 34 4 4 4 4 45 5 5 5 5 56 6 6 6 6 67 7 7 7 7 78 8 RUN 102 8 8 8 89 9 9 9 9 9

10 10 10 10 10 1011 11 11 11 RUN 103 11 1112 12 12 12 12 1213 13 13 RUN 103 13 13 13 RUN 10414 14 14 14 14 1415 15 15 15 15 RUN 104 1516 16 16 16 16 1617 17 17 17 17 1718 18 18 18 18 1819 19 19 19 19 1920 20 20 20 20 2021 21 21 21 21 2122 22 22 22 22 2223 23 23 23 23 2324 24 24 24 24 2425 RUN 102 25 25 25 25 2526 26 26 26 26 2627 27 27 27 27 2728 28 28 28 28 2829 29 29 29 29 2930 30 RUN 103 30 30 RUN 104 30 3031 31 31 31

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<0.1 dBI.L. combining system

> ± 2 MHzBandwidth (± 0.5 dB)

68 %Efficiency IOT B

65 %Efficiency IOT A

23.8 dBGain IOT B

24.0 dBGain IOT A

69.3 dBGain

150 kWOutput power

Pout (kW) vs. Vin (mV)

0,00

20,00

40,00

60,00

80,00

100,00

120,00

140,00

160,00

0 100 200 300 400 500 600 700 800 900 1000

TXA and TXB (kW) vs input voltage (mV)

0,0

10,0

20,0

30,0

40,0

50,0

60,0

70,0

80,0

90,0

0 100 200 300 400 500 600 700 800 900 1000

TXA

TXB

AMPLIFIER MEASUREMENTS

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phase (deg) vs. output power (kW)- drive modulation

-2

0

2

4

6

8

10

12

0 20 40 60 80 100 120 140 160 180

phase (deg)

Circulator has been tested both at low and high power (with a variable high power short circuit). All remaining power components have been also tested.

From August 30, the amplifier is in operation connected to the circulator and two dummy loads 24 hours/day at different power levels from 100 to 150 kW.

IOT A (kW) vs. drive power (W)

0,010,020,030,040,050,060,070,080,090,0

313,8279,5254,3219,9199,3167,2140,9114,582,550,422,018,00

19,00

20,00

21,00

22,00

23,00

24,00

25,00

TXAgain

IOTB(kW) vs. drive power (W)

0,010,020,030,040,050,060,070,080,090,0

327,6295,5266,7228,2205,7178,2151,7121,688,054,323,818,00

19,00

20,00

21,00

22,00

23,00

24,00

25,00

TXBgain

The long term test should allow to discover and clear child defects of the new plant, if any.

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Introduction Introduction // Components / Components / Next ActivitiesNext Activities / Conclusions/ Conclusions

Next steps:

October shutdown:

Completion of installations of the power plants services.

Final check of waveguide run.

Construction of waveguide-hole final radiation shielding.

Optimization of components, if necessary.

January 2007 shutdown:

Connection to the cavity.

Regulation of LLRF.

In parallel: construction and test of the optimised door knob type coaxial to WG transition for the input power coupler.

First run of 2007:

New plant commissioning.

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Introduction Introduction // Components / Components / Next ActivitiesNext Activities / / ConclusionsConclusions

The first phase (phase A) of the ELETTRA RF Upgrade is in an advanced state.

Power plant components have been installed and are under test.

The new plant will start providing power to beam at beginning of next year.

Most of the components take benefit of existing products in UHF broadcast market and have been supplied by industries.

This phase will provide a certain amount of safety margin to the system and provide the booster power plant (to be installed in 2007).

Based on the results and on the development activities of the lab, a decision on the timing of the remaining phases will be taken.

Documents

Status of the ELETTRA RF System Upgrade Activities€¦ · elettra elettra elettra elettra elettra elettra 3 10th ESLS RF Meeting, DELTA Dortmund, Germany - 27th-28th September, 2006