L. H. Wu
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View article: Study of the tracking efficiency of charged pions at BESIII
Study of the tracking efficiency of charged pions at BESIII Open
Using $(10087 \pm 44) \times 10^6$ $J/ψ$ events collected with the BESIII detector in 2009, 2012, 2018 and 2019, the tracking efficiency of charged pions is studied using the decay $J/ψ\rightarrow π^+ π^- π^0$. The systematic uncertainty o…
View article: Offline data processing system of the BESIII experiment
Offline data processing system of the BESIII experiment Open
The BESIII experiment has been operating since 2009 and has received several upgrades, to study the $$\tau $$ -charm physics utilizing the BEPCII accelerator. The BEPCII is a double-ring multi-bunch collider with a luminosity of $$1 \tim…
View article: Effect of Ozonated Water Cleaning on Photon Stimulated Desorption in a Stainless Steel Chamber
Effect of Ozonated Water Cleaning on Photon Stimulated Desorption in a Stainless Steel Chamber Open
Aluminium vacuum chambers cleaned with ozonated water show a reduction of residual carbon and lower surface outgassing rate after baking. We would like to investigate if stainless steel chambers show similar ef-fects. A stainless steel tes…
View article: Aging effect in the BESIII drift chamber
Aging effect in the BESIII drift chamber Open
As the main tracking detector of BESIII, the drift chamber works for accurate measurements of the tracking and the momentum of the charged particles decayed from the reaction of BEPCII e+ and e-. After operation six years, the drift chambe…
View article: Study of the Tracking Method and Expected Performance of the Silicon Pixel Inner Tracker Applied in BESIII
Study of the Tracking Method and Expected Performance of the Silicon Pixel Inner Tracker Applied in BESIII Open
The inner drift chamber of the BESIII is encountering serious aging problem after five year's running. For the first layer, the decrease in gas gain is about 26% from 2009 to 2013. The upgrade of the inner tracking detector has become an u…