deletions | additions       diff --git a/sectionPROPOSED_SECO.tex b/sectionPROPOSED_SECO.tex  index 73f1e51..3a2a7bb 100644  --- a/sectionPROPOSED_SECO.tex  +++ b/sectionPROPOSED_SECO.tex 
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On the other hand users at ALBA have not yet requested single bunch operation.  {\em BESSY II:} applies features in the predominant multi bunch hybrid mode three groups of specific bunches beside the multi bunch train. Due to  the importance of these bunches, a filling is distorted, if the requested nominal current for these bunches cannot be met. Thus a distorted filling event starts whenever a  'low-beam-current' criterion for the specific bunches: bunches applies:  it starts below 91\% of the nominal bucket charge in the camshaft bunch (pump (4mA, pump  probe) or the slicing bunches (fs-pulse (4 mA, fs-pulse  intensity) or the 'ARTOF' bunch (pulse (3mA, pulse  picking, resonant excitation). A In addition  a  bunch purity of less than 200 is recorded as a 'distorted-filling' event. The typical bunch purity is well  above 5000. At BESSY a qualified evenMB  filling of the multi bunch train  is only of secondary relevance: only in low-alpha mode close to the CSR bursting threshold, all bunches have to be safely non-bursting. Apart from this, the exact filling pattern is negotiated w.r.t. the needs of the user run:  STXM experiments see phase jumps induced by high intensity bunches, bunches and  a long ion clearing gap, also which is  needed by the pulse picking chopper;in low-alpha mode close to the CSR bursting threshold, all bunches have to be safely non-bursting.  {\em Elettra:} has no on-line bunch purity measurement available.