OLAV 1 ALBA Vacuum System Lluis Miralles Eshraq Al -Dmour 11 th April 2005

OLAV 1, 11th -12th April 2005ALBA Vacuum System,Ll.Miralles E. Al-Dmour

OLAV 1

ALBA

Vacuum System

Lluis Miralles

Eshraq Al-Dmour

11th April 2005


Talk Outline

1. Background of ALBA.

2. Budget and Time schedule of the project.

3. General layout of ALBA.

4. The vacuum system layout.

5. First estimations of the power on the absorbers.

6. Instrumentations and Technology.

7. The pumping speed and the Pressure profiles.


Background of ALBA1990: 1ST attempt to fund a SR source in Spain1994: Generalitat (through a ¨Comissió¨ Promotora) contracts personnel in 1992 for the drafting of a SR project .1996: The Laboratori de Llum de Sincrotró (LLS) is created as a subgroup of the Institut Física Altes Energies (IFAE). This group was jointly funded between the DURSI and the OCYT and begun to elaborate a Detailed Design Study (DDS) for a Spanish SR source and prepare the case for its construction.1998: The DDS was handed in to the relevant authorities.2000: The LLS becomes a Consortium in its own right, between the DURSI and the UAB, with the mission to promote the use of SR, the development of SR projects and to Promote the construction of a Spanish SR source.2002: The Spanish Government and the Catalan Autonomous Government announce their decision to jointly fund the construction of a Spanish SR source in Catalunya.2003: The ¨Consorcio para la Construcción, Equipamiento y Explotación del Laboratorio de Luz Sincrotrón¨ (Consortium CELLS) is legally created with two governing bodies: ¨Comisión Rectora¨ and ¨Comisión Ejecutiva¨ .The Presidents of the Rectora and Executive Commissions are named.The Director of CELLS is appointed (October 2003).2003: Staff from LLS is legally transferred to CELLS (completed by 1-1-2004) and recruitment of other personnel starts Advertisements for the positions of Division

Heads (October 2003) are placed and project started.www.cells.es


Background of ALBA


Time SchedualeBUILDING:GEOTECHNICAL STUDY: 15-4-2004 to 1-5-2006DETAILED DESIGN STUDY: 15-7-2004 to 1-10-2005URBANIZATION OF SITE: 1-1-2004 to 1-1-2006BUILDING CONSTRUCTION: 1-1-2006 to 1-7-2007

ACCELERATOR COMPLEX:SPECIFICATIONS MANUAL: 1-1-2004 to 15-10-2004LINAC: 1-5-2005 to 1-7-2007BOOSTER AND STORAGE RING: 1-6-2005 to 1-6-2008COMMISSIONING: 1-10-2008 to 1-5-2010

BEAM-LINES AND EXPERIMENTAL STATIONS:CHOICE OF BEAM-LINE OBJECTIVES: 1-9-2003 to 1-10-2005INSTALLATION OF BEAM-LINES: 1-8-2008 to 1-8-2009COMMISSIONING WITH USERS 1-6-2009 to 1-5-2010

Budget and Time Schedule

Budget= 177.934 M€


Ideas Contest


Ideas Contest


Ideas Contest


Parameters

E=3GeV

I=400mA

εx=4.3nmrad

CSR=268.8m

Four fold symmetry

B=1.42T

Bending angle=11.25˚

Bending radius=7.047m

CB=249.6m top-up injector

General layout of ALBA

100MeV Linac

3GeV Synchrotron 3GeV

Storage Ring

4xLSS(7.8m)

12xMSS(4.2m)

8xSSS(2.6m)

33 (possible) beam lines

(17 ID/ 16 BM)


*16 vacuum section of two types:

• the unit cell.• the matching cell.

*Structure: (M-U-U-M)

*32+8 RF shielded gate valves.

General Layout of ALBA

Mat

chin

g C

ell

Unit Cell

Matching Cell

Unit Cell

LSS

SSS

MSS

LSS

MSS

SSS

MSS


The Vacuum Layout

Unit cell

Unit Cell, total length 13.7m

MSSMSS

SSS

Valve

Valve

Additional Valve

Matching cellUnit cell

LSSMSS

MSS

SSS

Additional Valve


The Vacuum Layout

Matching Cell, total length 11.52m

LSS or MSS

MSS or LSS

ValveValve

Matching cell Unit cell

LSS MSS

Matching cell


Vacuum Chamber DesignDipole Vessel 1. The vacuum chamber of ALBA

are stainless steel.

2. Standard vacuum vessel for all the dipoles.

3. Copper shield with cooling coils.

4. Gradient.

A-A

A

A

The main absorber


Vacuum Chamber Design

Magnets Vessel (Post-Dipole/Pre-Dipole)


Vacuum Chamber DesignMagnets Vessel (Post-Dipole)

1. Antechamber.

2. The ID beam line is out of the connection flange.

3. The bending magnet beam line out of the pumping port.

4. BPMs are welded to the vacuum chamber.



Magnets Vessel (Post-Dipole)

B-B

A

A

B

B

Cross section at the location of the sextupole magnet. Cross section at the location

of the quadrupole magnet

A-A

28

72



3 x LSS: (7.83m straight) available length 6.75m.

A

A

The insertion devices vacuum vessels.



12 x MSS (4m straight): available length; 3.1m without tapers (2.86m when tapers* considered)

* The final design of the tapers will depend on the ID to be used.

2 x SSS (2.6m straight): available length 2.2m.

The insertion devices vessels.

MSS

SSS


The first results for Power density on the absorbers

2-1

2-22-3

1-1

1-2

1-31-4

1-5

3-1

3-2 3-3 3-4

4-1

4-2

4-3

4-4

Max. Surface power density=250W/mm2 (with normal incidence).


Unit cell Vacuum sections

All metal valve reserved for RGA and

Roughing station

SIP

SIP

SIPSIP+TSP

SIP

SIP+TSP

SIP

Matching cell Vacuum sections

SIPSIP

SIP

SIPSIP+TSP

SIP SIPSIP+TSP SIP

All metal valve reserved for RGA and

Roughing station

SIP

SIP

SIPSIP

SIP

Instrumentations

Current from SIP to be measured


150l/s

150l/s

200l/s

150l/s

150l/s

150l/s

150l/s300l/s

500l/s300l/s

300l/s

500l/s

300l/s

150l/s

150l/s

150l/s

500l/s

300l/s

300l/s

150l/s

150l/s

200l/s

150l/s

500l/s

300l/s

300l/s

NEG coating

NEG coating

The Pumping Speed

*Nominal pumping speed for the storage ring= 60400 l/s

(NEG not considered)

* Nominal pumping for a vacuum cell= 3775 l/s

* Ion pumps and TSP, NEG coating for the narrow gap ID


The Pressure Profile

Static pressure

ηth=1.0·10-11 mbar.l/sec.cm2

Pavg,th=3.2·10-10 mbar

pressure thermal NEG

1.00E-12

1.00E-11

1.00E-10

1.00E-09

1.00E-08

0 5 10 15 20 25 30 35 40

distance (m)

pres

sure

(m

bar)

Narrow gap ID MSS

C=0.9l/sec



E=3GeV

I=100mA

Dose=1AH

Total average pressure= 2.0·10-8 mbar

Pressure Profile

1.00E-10

1.00E-09

1.00E-08

1.00E-07

0 5 10 15 20 25 30 35 40

Distance (m)

Pre

ssur

e (m

bar)


E=3GeV

I=400mA

Dose=1000AH~ 2 years

Total average pressure= 1.5·10-9 mbar


Pressure Profile

1.00E-11

1.00E-10

1.00E-09

1.00E-08

1.00E-07

0 5 10 15 20 25 30 35 40

Distance(m)

Pre

ssur

e (m

bar)


ACKNOWLEDGMENT

Lothar Schulz-SLS/PSI

Dieter Einfeld-CELLS

Documents

OLAV 1 ALBA Vacuum System Lluis Miralles Eshraq Al -Dmour 11 th April 2005