Activity for SuperKEB Optics
SuperKEKB MAC
2021/09/02
Akio Morita(SuperKEKB Optics Group / skb-itf-opt contact person)

Optics Activity under ITF●

SuperKEKB SAD to MADX conversion– Rogelio Tomas et.al– 1st meeting was hosted by CERN side.
– This includes converting FCC-ee SAD lattice into MADX.

●SuperKEKB beam dynamic study on LEGO
– Yunhai Cai– Porting LER lattice into LEGO & Comparing basic optical property with SAD.

●Talk about off phase sextupole study in SuperB– Pantaleo Raimondi– Confirming to Pantaleo for setting meeting. (Koiso-san & Masuzawa-san)●Investigation for operating on different ν s– Asked from beam-beam sub-groupActivity in SKB Optics Group(1)●Study ``how to implement perfect matched beamline’’– Hiroshi Sugimoto– Waiting design proposal updates●Rebuild LER lattice using updated IR Model– Hiroshi Sugimoto– Making β*y = 1mm base lattice

Activity in SKB Optics Group(2)●Study ``how to rotate sextuple during collision operation’’– Akio Morita– Investigating the required extra conponets for keeping orbit & linear optics during sextupole rotation.

Estimating extra hardware installation for keeping collision optics during sextupole rotation (waiting hardware feasibility check & costestimation of extra hardware)●
Both sextupole rotating system control software and magnet control software upgrade WOULD be required.
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Extra hardware installation depends with the required operation level.
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SAD development to improve long container generation for processing long trend data (analysis & graphrendering)– Akio Morita– Development items

Variable temporary container on system heap (implemented)
Rewriting container generators (ongoing / needs code cleanup before rewriting)●
Stackless expression evaluator (planing / needs current code investigation)●●

Activity in SKB Optics Group(3)●Study of semi-perfect matched lattice– Haruyo Koiso– Sample lattice was built, waiting simulation result

from Oide-san●

Study of D2V1 collimator phase matching– Haruyo Koiso

Activity in SKB Optics Group(4)●Alasysis of IPTilt knob history during collision– Yukiyoshi Ohnihi●

Investigation of nonlinear collimator optics– Kentaro HaradaSummary●

Many tasks are preparing / ongoing. (My list MIGHT BE incompele)●

It is difficult to follow up the individual task activity, because...
– Activity is not reported to well known & common public space.
●skb-itf-opt mailing list was launched, however...
– Its ML archive is not accessible from outside of KEK network.
– Some participant redirects the discussion thread on ML to the direct mail passing.
●●

The following discussion is invisible from other participant and is not archived in ML archive.

skb-itf-* does not provide the issuse tracker system for visualizing / sharing progress of individualtask activity.

– The information on the collabolation IT tools (document service, issue tracker, website…) is incomplete and does not have well formed index page for referencing.
●The up-to date mailing list participant list is now available:– https://www-linac.kek.jp/linac-com/skb-itf/ml/– The information sharing condition is not changed before SuperKEKB ITF.

ML Thread Redirection
Thread started on skb-itf-opt ML by Demin-san.

Thread flow redirects to direct mail.
It seems like a thread on skb-itf-opt ML,
however, following sequence is hidden from ML.

These communication does not share with skb-itf-bb.