The East Area beam-lines

Cornavin station of the PS

Quick overview– where is what ?– our responsibility– Destinations– Ob-names

Beam requests + external conditions

Different modes of operationWhich elements steer the beamAdjusting the quality of the beam

– positioning on target– sweep– background noise

Examples

Time table: -- F61 (east-hall) gate 354 --14.00__

14.10 __14.25__14.35__14.45__

14.55__

Quick overview• Where is what ?

– North area ( T11, T10, T9 )– South area ( T8, T7, T7, irrad. )– Splitter

Quick overview• What is a splitter? A double

knife!!

orSplitter off

Splitter on

Quick overview• Our responsibilities

– for north area• at the target F61N.MTV02

– for T8 area• at target ZT8.MTV01

– for T7 area• at F61S.BHZ02 in irradiation mode• at target ZT7.MTV01 in normal mode

irradT7

ZT8.MTV01

ZT7.MTV01

F61S.BHZ02

Quick overview• Destinations

– only to north• DN0• DN1

– only to south• DS7 ( irrad.)• DS8

– shared• DNS7 ( irrad.)• DNS8

Quick overview• OB names

– how are they build up?

XXX.DHZ02NS

Equipment name

Suffix triple PPM

Beam Line prefix

Quick overview• OB names

– What is triple PPM ?

One power supply with more then one CCV value per user depending on destination– How does it work ?

POWER SUPPLY

EASTA

F61.DHZ01NS 10Amp

F61.DHZ01S 1Amp

F61.DHZ01M 0Amp

DNS7 or DNS8

DS7 or DS8

All other(DN0 or DN1)

One table for each user

POWER SUPPLY

EASTB

F61.DHZ01NS 8Amp

F61.DHZ01S 2Amp

F61.DHZ01M 0Amp

DNS7 or DNS8

DS7 or DS8

All other(DN0 or DN1)

One table for each user

EASTA EASTB

Quick overview• OB names

– Examples :

Be careful with interpreting names ! DNS7 or DNS8

DS7 or DS8

DN0 or DN1

Not PPM

User PPM Not the same!!!!

DNS7

DNS8

DN0, DN1, DS7 or DS8

Beam requests + external conditions

All beam request and inhibits are treated as external conditions and some of them can be overwritten by software.

– Requests• EASTA_RQ• EASTB_RQ our request• EASTC_RQ (with alarm program or Op-display)

• ENORD_RQ• ESUD_RQ Physicists request• ET8_RQ (toggle panel in counting barracks)

– Inhibits• ENORD_IN• ESUD_INH• ET8_INH

Inhibits MCR(pushbuttons)

Beam requests + ‘external conditions’Priorities

+&

&

EASTA_RQ

ENORD_RQ

ENORD_IN

ESUD_RQ

ESUD_INH

Beam executes+

&

EASTA_RQ

ENORD_RQ

ENORD_INH

Beam executes

+&

EASTA_RQ

ESUD_RQ

ESUD_INH

Beam executes

XXX = Request from Operation display or Alarm Program

XXX = Hardware request overwritable with Alarm Program

XXX = Hardware inhibit form MCR

If destination is DNS7

If destination is DS7

+&

EASTB_RQ

ET8_RQ

ET8_INH

Beam executes

If destination is DN1

If destination is DS8

Beam requests + external conditions

Overwrite by software

Hardware ENORD_RQ

Software ENORD_RQ &

Status

Requests EASTA_RQ , EASTB_RQ and EASTC_RQ only by software

Alarm program Operation display

Beam requests + external conditions• How does it work

Every destination for the East area is calculated !

Judge task

“FIDO”

calculates the correct destination

Request, external conditions and inhibits

Destination and user from PLS line

Calculated destination:

(destination + suffix C)

Beam requests + external conditions• Destination optimizationThis is done in the FIDO !

destination PLS request calculated

DNS7 ENORD_RQ and ESUD_RQ DNS7C

ENORD_RQ DN1C

ESUD_RQ DS7C

DN1 ESUD_RQ DN1C

DS7 ENORD_RQ DS7C

DS8 ET8_RQ DS8C

Beware of inhibits!!

Beam requests + external conditions• What about TOF

TOF

FTN or D3

EASTC

FTN or D3

Ejec. TOF Ejec. EAST

If in PLS editor “TOF_EAST” is set to 1 then this destination is treated like FTN + DNS7 like previous page.

DNS7 ENORD_RQ and ESUD_RQ DNS7C

ENORD_RQ DN1C

ESUD_RQ DS7

Beware of inhibits!!

Different modes of operation

Look on the EAST AREA web page:

Different modes of operation

T9, T10, T11 with splitter off (DN0) (the only destination where the splitter is off)

T9, T10, T11 with splitter on (DN1)

Different modes of operation

T7 secondary beam (DS7) T7 irradiation's (DS7) (never used up

to now)

T8 primary beam (DS8)

Different modes of operation

Why do we never use DS7 when they do irradiation in the

T7 area ? This is why:

DS7

DSN7

Splitter knives

Sweep

Sweep

Non homogeneous

Homogeneous

Different modes of operation T7 secondary beam (DNS7) shared with

T9, T10 and T11 T8 primary beam (DNS8) shared with T9, T10

and T11 (never used up to now because this decreases the

beam quality for DIRAC)

T7 irradiation's (DNS7) shared with T9, T10 and T11

Which elements steer the beam

In the East hall all the heavy work is done by non PPM elements or elements that are (triple) PPM but very slow . The small corrections are done with triple PPM elements

Which elements do the heavy job? The bendings.• In the common line (F61):

– BHZ01 and BHZ02 (Beam to dump elements)

• The north area (F61N):– BVT01

• The south area (F61S):– BHZ01– BHZ02 (limited triple PPM)

• The T8 area (DIRAC):– BHZ01– BHZ02

• The T7 area:– BHZ01

Which elements steer the beam good cycle bad cycle

A A B B A A B B B

Adjusting the quality of the beam Up to F61.MTV01What can we adjust• with the slow extraction

– PE.SMH61,PESMH57 => horizontal position on splitter

• in line F61– QFO01 =>horizontal size

• What can we measure– MSCO1 =>extracted intensity– the size and position on MTV01

The first screen is seen as the separator between PS and East hall

Adjusting the quality of the beam Line F61The screens MTV02 and MTV03• What can we adjust

– DHZ.01 =>horizontal ejection error– QDE02 => vertical size on splitter– DVT01, DVT02 =>vertical position on splitter– QFO03, QDE04 =>focalization on splitter

The horizontal position on both screens must be the same to avoid sending beam to heaven or hell !

MTV02 knives MTV03

DVT01

DVT02

Adjusting the quality of the beam Line F61NUp to the target MTV02• What can we adjust

– QDE01, QFO2 =>focussing on target– DVT01 =>vertical position on target (see demonstration)– DHZ01 =>compensation of sweep due to energy spread in beam (controlled with

GSDHZ01)• What can we measure

– MSCO1 =>extracted intensity on the target– MTEL01=>number of particles after target (fluctuates when beam is badly centered)

Line F61SUp to the target ZT7.MTV01• See above in case of secondary mode

• In case of irradiation we use other optics and use the sweep to get a homogeneous irradiation

Adjusting the quality of the beam Background noise (dirac)

Losses somewhere in the machine (especially in the beam lines) create muons that pass through the detector of DIRAC and make that they see less valid events

What to do about it– center the beam in the vacuum chamber all the way up to the target– Play with the position and focus on the target to reduce the

background noise

Big muon detectorSmall muon detector (one tenth of a big one)Here we readout the background noise

Examples (fill in the table) splitter on off MTV02 MTV03 N T7 T8

DN0

DN1

DS7

DS8

DNS7

DNS7 irrad

DS7 irrad

DNS8

Examples splitter on off MTV02 MTV03 N T7 T8

DN0

DN1

DS7

DS8

DNS7

DNS7 irrad

DS7 irrad

DNS8