Accelerator R&D for Future

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15 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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1

Accelerator R&D for Future
Large Colliders at IFIC

Scientific Staff:

A. Faus
-
Golfe, C. Alabau, J.J. García,

S. Verdu, J. Alabau

Technical Staff:


J.V. Civera, C. Blanch


ILC Spain 09

2

Capabilities

-

CALCULATION

BEAM

DYNAMICS

EXPERTISE
:


Electromagnetic

analysis



Electric

circuits

&

electronics


Mechanical

analysis



Optics

design


Non
-
linear

dynamics

studies


New

instrumentation

techniques


Commissioning


3
-
D

modelling

of

BPM

-

PROTOTYPING


Design
:

tooling,

drawings


Fabrication

follow
-
up


Assembly


Testing

and

Calibration

BEAM

INSTRUMENTATION

:

ILC Spain 09

Emittance

simulations

and

measuremts

in

ATF


3

Main ongoing projects



ILC

and

its

Test

Facility

ATF
-
ATF
2
:



Beam

dynamic

studies

and

commissioning

of

the

ATF

EXT

line

(LAL,

KEK,

SLAC)


Multi
-
OTR

system

for

ATF
2

(SLAC,

KEK)


BPM

supports

with

micromovers

for

FONT
4

in

(KEK,

JAI)


BDS

instrumentation

studies



CLIC

and

its

Test

Facility

CTF
3
:



BPM’s

for

the

TBL

in

CTF
3

(UPC,

CERN,

Applied

Physics
-
UV)


Drive

Beam

BPM’s

for

CLIC

module

(CERN)






ILC Spain 09


Super

Large

Hadron

Collider
:



Beam dynamics studies and measurements on beam halo, intensity
reach and collimation efficiency
(CERN
-
EUCARD)

4

ATF

was built in KEK (Japan) to create small emittance beams.

The Damping Ring of ATF has a world record of the normalized emittance of
3x10
-
8

m rad at 1.3 GeV.


ATF2

has been built to study the feasibility of focusing the beam into a
nanometer spot (~40 nm) and nanometer stability in a future linear collider
.

Extraction line

drives the beam

from ATF to ATF2

ILC and its Test Facility ATF/ATF2:

ILC Spain 09

5

(OTR)

extraction

diagnostic section

wire scanners

OTR monitor

ATF and ATF2:
Emittance growth

Since several years, the vertical emittance measured in the
diagnostic section of the EXT line is significantly larger than
the emittance measured in the DR.

The simulations and the measurements of the effect of non
-
linear magnetic fields (mainly QM7R) show an emittance
growth with a strong dependence with the extraction
position. But still there must be another source for the
emittance growth since the extracted beam was significantly
larger than expected in three of the data sets.

Recently, the QM7R magnet was replaced by a similar one
with larger aperture, for which magnetic measurements and
simulations indicate that non
-
linear fields are negligible at
the extraction position.





The beam passes horizontally
off
-
axis through the shared
magnets with the DR

ILC Spain 09

Beam size at the OTR/XSR

6

Emittance measurements with the wire scanners located in the diagnostic section
of the EXT line are very slow.


(OTR)

extraction

diagnostic section

wire scanners

OTR monitor

Multi
-
OTR

(
4

units)

beam dynamics studies, design, construction, and characterization
including associated software control and electronics


ATF and ATF2:

Multi
-
OTR System


ILC Spain 09

6

ILC Spain 09

7

ATF and ATF2:

Multi
-
OTR System

OTR1X

OTR0

OTR1

OTR2

OTR3

OTR4

extraction

diagnostic section


The location of the OTR’s has to be optimized such that the phase advances be
apropiate to allow emittance measurements

ILC Spain 09

7

ILC Spain 09

8

ATF and ATF2:

Multi
-
OTR System

ILC Spain 09

Beam dynamics calculated with MAD to study the beam sizes in order to place
the OTR’s
.

MW0X

MW1X

y
vs

x

x’
vs

x

y’
vs

y

8

ILC Spain 09

9

ATF and ATF2:

Multi
-
OTR System

Current OTR installed in the ATF2 EXT line

target

CCD camera

beam

The current OTR was updated with a new target and target actuator, calibrated and
tested with beam during November
´
09.

Beam spot measurement with OTR

9

ILC Spain 09

10

ATF and ATF2:

Multi
-
OTR System

New

design

of

the

OTR

for

ATF
-
ATF
2


-

Target actuator relocated to the top (
no
interference with the girder) and smaller
design


gr敡瑥e 晬數ebili瑹 in 瑨攠佔R
pl慣敭敮t


-

Thinner target


r敤u捥cr慤i慴aon d慭慧e


-

CCD 捡浥牡cp慲慬l敬 瑯 瑨攠瑡tg整e⡢敦er攠i琠
wa猠no琠p慲慬l敬, whi捨 浥慮琠瑨慴a瑨攠b敡洠
獰o琠wa猠in 景捵猠on only 愠獭慬l por瑩on o映
瑨攠瑡tg整⤠


gr敡瑥e d数瑨 o映晩敬d.


-

12 bit camera for more dynamic range with
smaller pixel size for more resolution.

New OTRs will have same controls and motion capabilities as current OTR

with the following improvements:


Focus adjuster

slide

X and Y target

position viewing

adjusters

Mitutoyo 10X lens

And 1x tube lens

90deg

mirror

Newport

Vertical mover

Newport

Horizontal mover

Target inserter

Prosilica camera

Installation planned on March
´
10

10

ILC Spain 09

11

ATF and ATF2:

BPM’s supports with micromovers for FONT4


Last line of defence
against relative beam
misalignment


Measure vertical position
of outgoing beam and
hence beam
-
beam kick
angle


Use fast amplifier and
kicker to correct vertical
position of beam incoming
to IR

FONT


Feedback On Nanosecond Timescales

IP intra
-
train feedback system

ILC Spain 09

11

ILC Spain 09

12

ATF and ATF2:

BPM’s supports with micromovers for FONT4

design, construction, and characterization including associated electronics
and software development of 3 sets

Range:
±
1 mm

Step size: 10
μ
m

Stability better than 1
μ
m

Time response ~ sec


ILC Spain 09


Realignment of BPM to
increase the resolution

Labview Software development

Movers & holding structure

12

ILC Spain 09

13

ATF and ATF2:

BPM’s supports with micromovers for FONT4

ILC Spain 09


One

set

has

been

assembled

and

installed

in

ATF
2
.

At

the

moment

it’s

under

modification

by

magnetic

problems
.


Other

two

sets

in

construction
.


Software

already

finished
.



Realistic

simulations

of

the

beam

dynamics

including

the

FONT

feedback

system

are

being

made

at

the

moment
.


Mover installed at ATF2

13

ILC Spain 09

14

The

TBL

is

designed

to

study

and

validate

the

drive

beam

stability

during

deceleration

in

CTF
3
.

The

TBL

consists

of

a

series

of

FODO

lattice

cells

and

a

diagnostic

section

at

the

beginning

and

end

of

the

line
.

Each

cell

is

comprised

of

a

quadrupole,

a

BPM

(labeled

as

BPS)

and

a

Power

Extraction

and

Transfer

Structure

(PETS)

.

3
D

View

of

a

TBL

cell

with

the

PETS

tanks,

the

BPS’s

and

the

quadrupoles

2.25 cm

BPS Prototype

Inductive Pick
-
up (IPU)

TBL beam time structure

Inductive
sensors PCB

The CLIC and its Test Facility CTF3:

ILC Spain 09

15

CTF3:

BPM’s for the Test Beam Line


BPS Prototypes, Series Production and Calibration



A

set

of

two

prototypes

of

the

BPS's

labeled

as

BPS
1

and

BPS
2

with

its

associated

electronics

has

been

designed,

constructed

and

characterized

by

the

IFIC

team

with

the

collaboration

of

the

CTF
3

team

at

CERN

(May

2008
)
.

BPS1 and its support
installed in the TBL line

Measurements of the
BPS1 with beam in the
TBL line

ILC Spain 09



BPS
1
,

jointly

with

its

support

and

its

amplifier,

was

installed

successfully

at

TBL
;

BPS
2

remained

at

IFIC

as

spare

(July

2008
)
.



BPS
1

first

beam

measurements

were

carried

out

(August

2008
)
.

Wire set
-
up for BPS prototype
characterization tests at CERN Labs

Low
-
frequency
wire set
-
up

3D view design

Control and DAQ equipment
for all the setup signals

Overview of the new wire test bench for BPS
series characterization tests at IFIC labs



A

new

wire

test

bench

for

BPS

series

characterization

tests

was

designed

and

built

at

IFIC

(March

2009
)
.



The

BPS

series

production

(
15

units)

started

at

IFIC

labs

(November

2008
)
.

CTF3:

BPM’s for the Test Beam Line


BPS Prototypes, Series Production and Calibration



Tests for BPS2 and BPS3 carried out with the new wire
set
-
up at IFIC. Less than 50um accuracy (March 2009).


Two more BPS units was delivered and installed, BPS2 and
BPS3 both with new improved electronic PCBs (May 2009).



14 BPS units construction and assembly process finished
(August 2009).



A LabVIEW application (SensAT v1.0) is developed for
automatize the BPS series characterization tests in the new
wire test bench (September 2009).



The 14 BPS units tests finishes, they are delivered to
CERN and finally installed in TBL (October 2009).



All the BPS are validated successfully in TBL after first
calibration tests (October 2009).


Beam tests in TBL for the full installed BPS series.
Measurements at high beam current (30A) and checking of
the BPS’ resolution and performances.



All BPS units jointly with its supports and
amplifiers installed in TBL (CLEX area, CERN).

Calibration test in TBL shows good BPS
performance with flat
-
top pulse response.

16

ILC Spain 09

CTF3:

BPM’s for the Test Beam Line


BPS High Frequency Test

3D views of the High frequency set
-
up design

for measuring the BPS longitudinal coupling impedance




To determine the BPS longitudinal
coupling impedance at more than
12GHz, affecting beam stability.



Development of HF set
-
up has been
carried out in parallel of the BPS series
production.



Electromagnetic simulation of HF set
-
up design (until 30GHz) with specialized
software FEST3D



HF set
-
up manufacturing and BPS HF
tests to be performed next January

Simulation results of last HF set
-
up design.

S11 reflection parameter from 0 to 30GHz.

Simulation SW: FEST3D

Simulation SW: HFSS

-
40dB

-
40dB

17

ILC Spain 09

18

CLIC:

Drive Beam BPM for the 1st CLIC module


DB BPM

The drive beam quadrupole and BPM are mounted on the drive beam girders. BPMs cannot be
moved independently of the PETS, the quadrupoles will either be on movers, or equipped with
dipole corrector coils. The BPMs are mounted before quadrupoles. The acceptable level of wake
field needs to be determined.

Accuracy

Resolution

Stability

Range

Bandwidth

Beam tube
aperture

Available
length

Intercepting
device?

How
many?

Used in RT
Feedback?

Machine
protection
Item?

Comments

Ref

BPM

20µ
m


m

?

<5mm

35MHz

23mm

104/74mm

No

41480

Yes

Yes

Inductive ?

Strip line

?

CLIC note 764

Nominal beam
parameters:
Charges/bunch:
5.2 10
10


Nb of Bunches:
2922

Bunch length:
1mm

Train length:
243.7ns


19

ILC Spain 09