The East Area beam-lines Cornavin station of the PS Hide text with paper and say; For me the area is the

Time table: -- F61 (east-hall) gate 354 -- 14.00__ 14.10 __ 14.25__ 14.35__ 14.45__ 14.55__ Quick overview where is what ? our responsibility Destinations Ob-names Beam requests + external conditions Different modes of operation Which elements steer the beam Adjusting the quality of the beam positioning on target sweep background noise Examples

Quick overview Where is what ? North area ( T11, T10, T9 ) South area ( T8, T7, T7, irrad. ) Splitter Point every item on the main view on the whiteboard Mention irradiation zone 2 (use of protons that go though the target) QUESTION: “who can tell me what a splitter is”

Quick overview What is a splitter? A double knife!! or Splitter off Looks like a double septum We can adjust the splitter gap and the current. The bigger the gap the higher the current needed. We’re at the maximum. Splitter on

Quick overview Our responsibilities for north area for T8 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 ZT8.MTV01 Until primary beam-and target zones. (point out on main plan) We help people with power failures but never change values ZT7.MTV01 F61S.BHZ02 irrad T7

Quick overview Destinations only to north only to south shared DN0 DN1 DS7 ( irrad.) DS8 shared DNS7 ( irrad.) DNS8 Point to drawing on whiteboard DNS8 is never used up to now.

Quick overview XXX.DHZ02NS OB names how are they build up? Suffix triple PPM Equipment name Beam Line prefix Point to drawing on whiteboard and make for every line an example QUESTION: Can anyone tell me what triple PPM is

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 ? EASTA F61.DHZ01NS 10Amp F61.DHZ01S 1Amp F61.DHZ01M 0Amp One table for each user DNS7 or DNS8 POWER SUPPLY DS7 or DS8 All other (DN0 or DN1) EASTA EASTB EASTB F61.DHZ01NS 8Amp F61.DHZ01S 2Amp F61.DHZ01M 0Amp One table for each user DNS7 or DNS8 POWER SUPPLY DS7 or DS8 All other (DN0 or DN1)

Quick overview OB names Be careful with interpreting 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 If destination is DNS7 If destination is DN1 EASTA_RQ EASTA_RQ ENORD_RQ ENORD_IN + ENORD_RQ ENORD_INH Beam executes & & + Beam executes ESUD_RQ ESUD_INH & If destination is DS8 If destination is DS7 EASTB_RQ + EASTA_RQ ET8_RQ ET8_INH Beam executes & Gate drawings are just for understanding its not the way the are connected!! For EASTA_RQ you can also fill in EASTB_RQ or EASTC_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

Beam requests + external conditions Overwrite by software Hardware ENORD_RQ Software ENORD_RQ Requests EASTA_RQ , EASTB_RQ and EASTC_RQ only by software & Alarm program Operation display Status Make comparison with the “aiguillage”

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 Calculated destination: (destination + suffix C) Destination and user from PLS line FIDO is executed two times first one cycle before to decide on beam request and external conditions to execute the normal or spare cycle. the second time is at the beginning of the cycle to calculate the destination. Calculated destination will be visible on Ps vistar and EAST hall vistar.

Beam requests + external conditions Destination optimization This 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!! In this drawing no request can mean No request or a request and an inhibit.

Beam requests + external conditions What about TOF Ejec. TOF Ejec. EAST EASTC FTN or D3 TOF FTN or D3 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: This page a lot more then mentioned here but with this page you can see all the settings needed to do adjustments when mister KOUPTSOV arrives.

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) QUESTION: Does anybody know why we never used DS7 up to now.

Different modes of operation Why do we never use DS7 when they do irradiation in the T7 area ? This is why: Sweep DS7 Non homogeneous Splitter knives Probably the left and right side are not accurate. Sweep DSN7 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): BHZ02 The T7 area: QUESTION: does anybody knows which elements are the heavy ones?

Which elements steer the beam good cycle bad cycle A A B B A A B B B QUESTION 1: Why is the bad cycle bad? QUESTION 2: If we have A followed by B and both have the same destination why can it still go wrong.

Adjusting the quality of the beam Up to F61.MTV01 What 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 Big job is done on MTV01 after we use small corrections for the splitter

Adjusting the quality of the beam Line F61 The 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 Use the thumb stick

Adjusting the quality of the beam Line F61N Up 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 F61S Up 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 Cover the text and tell that the beam sweeps. QESTION: Why does the beam sweep?

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 Cover the text ask the question. QUESTION: Who knows what the background noise is? This year the procedure will probably change so we won’t go any deeper now Muons go through anything except iron can slow them down This year they’ll install more iron shielding tell about “corona” Small muon detector (one tenth of a big one) Here we readout the background noise Big muon detector

Examples (fill in the table) Cover the text ask the question. QUESTION: Who knows what the background noise is? This year the procedure will probably change so we won’t go any deeper now Muons go through anything except iron can slow them down This year they’ll install more iron shielding

Examples Cover the text ask the question. QUESTION: Who knows what the background noise is? This year the procedure will probably change so we won’t go any deeper now Muons go through anything except iron can slow them down This year they’ll install more iron shielding