Tenders Are Invited For Laboratory, Optical And Precision Equipments (Excl. Glasses) – V297_2025 – Wi-Aos - Plangittermonochromator Nap-Leem-Xpeem (Bessy Ii+)

Laboratory, Optical And Precision Equipments (Excl. Glasses) – V297_2025 – Wi-Aos - Plangittermonochromator Nap-Leem-Xpeem (Bessy Ii+). 1 Le Monochromator In Accordance With The Service Description (Technical Specification) And Tender Documents --- In Recent Years, Over 20 Flat Grid Monochromators With Variable Deflection Angles Have Been Successfully Put Into Operation At The Hzb. The Central Element Of These Beamlines Is The Grid Chamber, Which Accommodates Several Grids And A Plane Mirror. The Plane Mirror Is Used To Adjust The Deflection Angle On The Grid And Is Mounted In The Sx700 Geometry. The Plane Grid Monochromator Contains A Plane Mirror And Two Plane Grids. In Order To Achieve High Energy Resolution, The Mechanical Tolerances Are Very Small (Din Iso 2768-1/2) And Must Be Adhered To During The Design And Manufacture Of The Instrument. All Optical Elements Are Located In A Uhv Chamber And Are Water-Cooled. The Chamber Holder Consists Of Two Separate Structures: One For The Internal Mechanics And One For The Vessel. Both Must Be Decoupled From Vibrations. The Mount For The Internal Mechanics Must Be Very Stable And Rest On A Block Of Granite. The Holder For The Vessel Is Connected Directly To The Ground Near The Granite Blocks Via A Separate Frame. The Axis Of Rotation Of The Grating Is At The Position (0 Mm, 20 Mm), The Axis Of Rotation Of The Mirror Within The Grating Body Is At The Position (0 Mm, 30.1 Mm*) In Order To Always Direct The Beam To The Center Of The Grating For All Energies, C-Values ​​And Both Gratings. The Nominal Height Of The Grid Axis Above The Ground Is 1420 Mm. Participation In A Site Visit Is Recommended By The Hzb, But The Award Is Not Binding. The Subsequent Objection That A Bidder Was Not Able To Obtain Sufficient Information In Advance About The Requirements Of The Order Or The Local Conditions And That An Adequate Calculation Was Therefore Impossible Is Expressly Rejected.