new master oscillator at flash

New Master Oscillator at FLASH

Krzysztof Czuba *, Henning Weddig #

*Institute of Electronic Systems, Warsaw, [email protected]

#DESY, [email protected]

FLASH Seminar, 7 Oct. 2008

07.10.2008 Krzysztof Czuba, Henning Weddig FLASH Seminar 2

People Involved in the MO Project

Henning Weddig: requirements, concept, schematics, contacts with industry

Krzysztof Czuba: hardware and measurement work, diagnostics, planning and organization of students work, documentation

Frank Ludwig: helped managing the installation in June/July 2008

Thomas Froehlich: hardware installation in FLASH

Erhard Salow (Inwave Company): design and manufacturing sub-assemblies

Students (assembly, measurements, experiments): Bastian Lorbeer, Andrzej Stefanski, Michal Ładno, Jan Piekarski, Dominik Sikora, Łukasz Zembala

Technicians: Bartlomiej Szczepanski, Bibiane Wendland


Requirements for the MO System

• Generated and distributed frequencies: 50 Hz, 1 MHz, 9 MHz, 13.5 MHz, 27 MHz, 81 MHz, 108 MHz, 1.3 GHz, 1.517 GHz, 2.856 GHz

• Required signal phase stability (@ 1.3 GHz):– Short term: 0.1 ps (integrated timing jitter 10 Hz – 1 MHz)– Long term (1000s): 1.0 ps– Long term (days): 5.0 ps


Basic Decisions

- OCXO reference oscillator

- RF frequency synthesizer and frequency divider network

- 19” crate system

- Diagnostics incorporated into MO crates


Some History ...

● In 2001 a 20 page requirement document created by H.W. was sent to industry. Only one company offered building the MO. Others claimed they could not do it or offered very expensive research

● Requests for new signals, frequencies and powers, more tap points forced changing concept and rebuilding ready boxes. This influenced the growth of the diagnostic system and the power supply.

● Many problems had to be solved: e.g. cabling, power supply filtering, ground loops, heat dissipation, sensitivity to mechanical vibrations, parts breaking down (manufacturer error), commercial components not fulfilling specs....

Very first New MO1 crate!


Basic System Conception● Six 19” crates

● Diagnostics integrated with each crate

1.3 GHz PLL 1.3 GHz POWER AMPLIFIER

1.3 GHz

PA – Power Amplifier

44 dBm

30 dBm

LOW POWER PARTOCXO

9 MHz

~ 81 MHz PLLx 9

108 MHz PLLx 12

Div. : 3

Div. : 2

Div. : 9

Div. : 9

PLL x 144

PA

27 MHz

13.5 MHz

9 MHz

1 MHz

108 MHz

PA

1.3 GHz DISTRI-BUTION BOX

81 MHz POWER AMPLIFIER

81 MHz40 dBm

PA

81 MHz DISTRI-BUTION BOX

DDS 50 Hz


Low Power Part – Crate Design Example


Low Power Part – Assembly

IN

OU

T

OU

T

SPLITTER

SM

A

SMASMA

OUT

9 MHz PA

SMA

SM

A

SM

A

SM

A

SM

A

SM

A

INO

UT

9 MH

z TT

L DR

IVE

R

SM

AS

MA

INO

UT

1 MH

z T

TL DR

IVE

R

SM

AS

MA

5V POWER SUPPLY

DIV

IDE

R 9/1

IND

ET

EC

L O

UT

SIN OUT

SM

A

SM

A

SMA

SMA

SMA

DIV

IDE

R 81/9

IND

ET

EC

L O

UT

SIN OUT

SM

A

SM

A

SMA

SMA

SMA

DIV

IDE

R 27/13.5

IND

ET

EC

L O

UT

SIN OUT

SM

A

SM

A

SMA

SMA

SMA

DIVIDER 81/27

IN DET

ECL OUT

SIN

OU

T SMA

SMA

SM

A

SM

A

SM

A

SMA

SMA

LOC

KM

ON

ITO

R

SMA

SMA

LOC

KM

ON

ITO

RC

PL

INOU

T

COUPLER

SM

A

SMASMA

PLL

5S

MA

SM

A

SM

A

RE

FFI

N

Vtu

nePLL

5S

MA

SM

A

SM

A

RE

FFI

N

Vtu

ne

IN

OU

T

OU

T

SPLITTER

SM

A

SMASMA

SMA Vtune

OUT

81 MHzVCXO - PA

SMASMA Coupl

SM

A

SM

A

SM

A

SM

A

50 Hz

DD

SD

DS

50Hz

SMA Vtune

OUT

108 MHzVCXO - PA

SMASMA Coupl

SM

A

SM

A

SM

A

SM

A

CP

L

IN

OU

T

COUPLER

SM

A

SMA SMA

PO

WE

RD

ET

EC

TOR

OUT

IN

SM

A

Vcc

CP

L

INOU

T

COUPLER

SM

A

SMASMA

SMA

9MHzOCXO

12V POWER SUPPLY

FRONT

Power

9 MHz

108 MHz Lock

1 MHz

9 MHz

9 MHz OCXO 9 MHz PA

27 MHz

81 MHz VCXOPA

108 MHz VCXOPA 13.5 MHz

Signal Amplitude

Ext. Control In.

MASTER OSCILLATOR LOW POWER PART

+20 dBm1MHz TTL

+20 dBm +20 dBm +20 dBm9 MHz TTL 13.5 MHz

+8 dBm27 MHz+11 dBm

13.5 MHz+8 dBm

27 MHz+11 dBm

1MHz+8 dBm

108 MHz+20 dBm +20 dBm+20 dBm +20 dBm

108 MHz Monitor Out

50 Hz

Control 81 MHz Lock

Supply Voltage 12VSupply Voltage 5V

Int. Ext.

81 MHz Monitor Out

81 MHz+20 dBm +20 dBm+20 dBm +20 dBm


Distribution Box, HPA, PLL


Power Supply● Linear regulated power supply

● Battery backed up power supply for LPP and 1300 MHz PLL

● Unbreakable operation due to battery allows for maintaining signal phases in case of short mains power failure

● Diagnostics with Ethernet Interface


Before Installation ...

Finding proper connectors was a real challenge (no labels, many blind paths, etc...)


System Assembly - Concept

● Redundancy (two MO copies)

● Short cable (jumper) based switch


Installed MO System Scheme

MO RACK 1 MO RACK 2 MO RACK 3

RACK 1 PATCH PANEL TOP RACK 2 PATCH PANEL TOP RACK 3 PATCH PANEL TOP

LPP

PLL1300 PSI

RF CablesRack 1Page 3 RF Cables

Rack 3, page 5SWITCH PANEL

1.3GHz DISTRIBUTION BOX

81MHz DISTRIBUTION BOX

BOTTOM

TOP

BOTTOM

TOP

BOTTOM

TOP

RF Cables from Rack 1 to Rack 2,

page 4

PA

TC

H P

AN

EL

- C

AB

LES

RF Cables from Rack 3 to Rack 2, page 6

RF CablesRack 2, page 7

DistributionCables

RF Cables Rack 2, page 8

TABLE 3 TABLE 4

TABLE 5 TABLE6

TABLE 7

24 24

24

24 24

TABLE 1

TABLE 2



TABLE 8

TABLE 9

TABLE 10

TABLE 11

FREQ. COMPARISON BOX

PLL1517

HPA1300

HPA81

AQB (Data Acquisition)

AQB Patch PanelAQB (Data Acquisition)

AQB Patch Panel

LPP

PLL1300 PSI

PLL1517

HPA1300

HPA81

AQB (Data Acquisition)

AQB Patch Panel


Installed MO System


Rack 1 and Rack 2


MO Distribution Cables in FLASH

108MHz

10m

TTF CONTROLROOM

LLRF control racks

LOLA

165m 85m 19m140m260m 118m 105m 93m 56m 10m 0m44m

waveguide

20m

New LLRF control racks

18m

Klystron 3

RF GUNACC1ACC2ACC3ACC4

ACCELERATOR TUNNEL

HALL 3 extension HALL 3

EOS

RackLINAC 15 LINAC 9

Rack

LASER

ACC5ACC7 / ACC6LOLA

95m 40m56m

Klystron 2Klystron 1

Klystron 5

Klystron 4

MASTEROSCILLATOR

1.3GHz

1.3GHz

2856MHz

9MHz

13,5MHz

Cable 1

Cable 2

Cable 4

Cable 3

Cable 5Cable 15

Cable 6

Cable 10

Cable 11Cable 12

Cable 147/8" Cable 7

Cable 9

Cable 13Cable 8

Cable 22 1517MHz

1.3GHz

Fiber-Optic Cables

Cable 19Cable 20

Cable 21

1.3GHz

9MHz

81MHz7/8 " cable

7/8 " cable

1/2 " cable

27MHz

InjectorArea

EXPERIMENTAL

HALL


Diagnostics

Measured are:● Power levels● Phase changes over amplifiers● VSWR of most important cables● Crate temperatures● PLL lock status● VCO control voltages● Power supply voltages and currents


Data Acquisition for Diagnostics

PS Eth

Master Slave 0

Slave 1

Blind Blind Blind Blind

BLIND

M D M Ain S0 AinS0 D S1 AinS1 D S2 AinS2 D S3 AinS3 D S4 AinS4 D S5 AinS5 D S6 AinS6 D

4 TE

Analog Patch Cable

Digital Patch Cable

AQB CRATE

AQB PATCH PANEL

Slave 2

Data Acquisition PCB

Monitorig Crate and Patch Panel

PCB design and crate assembly by Michał Ładno


Diagnostics Software

PCB Firmware:

● Developed for the needs of the project

● Allows for data acquisition and communication within crate

● Allows for system extending without a need for PCB reprogramming

Server software features:

● Communication with crates

● On-line data acquisition and storage

● Software configuration of channel parameters and storage resolution – large flexibility


MO DOOCS Panels


LPP DOOCS Panel


Power Supply Panel


Frequency Comparison Box Panel


Laboratory Tests

● All MO crates were tested in laboratory

● Detailed test protocols available

Jitter ~36.7 fs


Measurements in Hall 3

● Phase noise levels measured in Hall 3 do not differ significantly from lab. measurement results!

● There is still need to investigate phase drifts

1.3 GHz phase noise in Hall 3


Current MO System Status

● Rack 1 and Rack 2 completed● Power supply for Rack 1 installed● Rack 3 crates ready in the lab, not installed yet● Power supplies for Rack 3 missing (ordering in

progress)● Diagnostic system final debugging in progress


Future Plans

● Install crates in Rack 3 and power supplies● Install Frequency Comparison Boxes in Hall 3 Ext. and

in Experimental Hall – important for drift analysis● Clean up cabling in injector area – some cables had

to go over the old MO rack. This can be improved during next shutdown

● Install sub-distribution boxes with diagnostics in Hall 3 Extension (shutdown time)

● Develop new concept of the 1.3 GHz generation to minimize phase drifts (if really needed)


Thank You For Attention!

new master oscillator at flash

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